COMPLETION CAPITAL COMMITMENT

          COMPLETION CAPITAL COMMITMENT (this  "Commitment") dated as of June 3,
1999,  between RIVIERA  HOLDINGS  CORPORATION,  a Nevada  corporation  ("Riveria
Holdings"),   and  RIVIERA  BLACK  HAWK,  INC.,  a  Colorado   corporation  (the
"Company").

                                    RECITALS

          A. First Mortgage Notes. The Company has issued $45,000,000  aggregate
principal  amount of 13% First Mortgage Notes due 2005 With Contingent  Interest
(together  with all notes  issued  in  exchange  or  replacement  therefor,  the
"Notes")  pursuant  to an  Indenture  (as  amended,  supplemented  or  otherwise
modified from time to time, the "Indenture") dated as of the date hereof between
the  Company  and  IBJ  Whitehall  Bank &  Trust  Company,  a New  York  banking
association,  as trustee  (the  "Trustee"),  for the benefit of the holders from
time to time (the "Holders") of the Notes.

          B.  Proceeds of the Notes.  The Company  will use the  proceeds of the
Notes for the development,  construction, equipping and operation of the Riviera
Black Hawk (as defined in the Indenture)  upon certain real property  located in
Black Hawk,  Colorado (the "Property") and for certain other purposes  described
in the Indenture.

          C. Riviera Holdings' Benefit. The Company is a wholly-owned subsidiary
of Riviera  Holdings  and,  as a result,  Riviera  Holdings  will  significantly
benefit from the construction and operation of the Riviera Black Hawk.

          D.  Material  Inducement.  It is a condition  precedent  and  material
inducement  to the  purchase  of the Notes  that (1)  Riviera  Holdings  and the
Company  shall have  executed and  delivered  this  Commitment  whereby  Riviera
Holdings has agreed that it will commit,  subject to the  limitations  set forth
herein,  for the  benefit  of the  Company  and  the  Holders,  to make  capital
contributions to the Company upon the terms, conditions and limitations provided
herein, (2) the Company shall have executed the Collateral  Assignment assigning
this Commitment,  among other things,  to the Trustee,  and (3) Riviera Holdings
shall have  executed  and  delivered  the Consent to  Collateral  Assignment  of
Completion  Capital Commitment  pursuant to which,  among other things,  Riviera
Holdings consents to the Company's assignment of this Commitment to the Trustee.

          E.  Definitions.  Capitalized  terms  used and not  otherwise  defined
herein shall have the meanings ascribed thereto in the Indenture.

                                    AGREEMENT

          NOW, THEREFORE,  in consideration of the foregoing  recitals,  and for
other good and valuable consideration,  the receipt and sufficiency of which are
hereby acknowledged, Riviera Holdings and the Company hereby agree as follows:



          1. Funding Amounts. Upon the occurrence of each Contribution Event (as
defined  below),  Riviera  Holdings  shall  pay,  after  receipt  of the  notice
described in Sections 3 or 4 below,  the applicable  Funding Amounts (as defined
below) into the Construction Disbursement Account for disbursement in accordance
with the  Cash  Collateral  and  Disbursement  Agreement.  For the  purposes  of
Sections 2(i), 2(ii) and 2(iii) below,  the "Funding  Amounts" shall be equal to
the  amount  in  immediately   available  cash  determined  by  the  Independent
Construction Consultant,  based upon the Construction Disbursement Budget, to be
necessary to cause a Contribution Event to no longer exist;  provided,  however,
that in no event shall the aggregate amount of all Funding Amounts paid pursuant
hereto  exceed  $10,000,000;  provided,  further,  that for purposes of Sections
2(iv),  2(v)  and  2(vi)  below,  the  Funding  Amounts  shall  be  equal to the
difference  between  $10,000,000  and the  aggregate  Funding  Amounts,  if any,
previously   paid  under  Section  2.  Such  proceeds  shall  be  used  for  the
development,  construction,  equipping and  operations of the Riviera Black Hawk
pursuant to the terms of the Indenture,  the Cash  Collateral  and  Disbursement
Agreement and the other Collateral Documents.

          2.  Contribution  Event.  A  "Contribution  Event"  means  any  of the
following:  (i) there are  insufficient  Available Funds (as defined in the Cash
Collateral   and   Disbursement   Agreement)   to  complete   the   development,
construction,  equipping  and  opening of the  Riviera  Black Hawk so that it is
Operating by the Operating  Deadline;  (ii) the Company has provided the Trustee
and the  Independent  Construction  Consultant  with a written notice that it is
unlikely  that  there  shall  be  sufficient  Available  Funds to  complete  the
development,  construction,  equipping  and opening of the Riviera Black Hawk so
that it is  Operating  by the  Operating  Deadline;  (iii)  (a) the  Independent
Construction  Consultant has provided the Trustee and the Company with a written
notice  that it is  unlikely  that  there  will be  sufficient  Available  Funds
(excluding  any  Additional  Revenues  (as  defined in the Cash  Collateral  and
Disbursement  Agreement)) to complete the development,  construction,  equipping
and opening of the Riviera  Black Hawk so that it is Operating by the  Operating
Deadline and (b) within ten days of the Company  receiving  notice  described in
clause (a) above,  the Company has not  provided  evidence  satisfactory  to the
Independent  Construction  Consultant that there shall be sufficient  Additional
Funds (including the amount of Additional Revenues) to complete the development,
construction,  equipping  and  opening of the  Riviera  Black Hawk so that it is
Operating  by the  Operating  Deadline;  (iv)  the  Riviera  Black  Hawk  is not
Operating by the  Operating  Deadline;  (v) the  commencement  of any  voluntary
bankruptcy  case by the  Company  on or  prior  to May  31,  2000;  or (vi)  the
commencement of an involuntary  bankruptcy case against the Company which is not
dismissed,  bonded or discharged on or prior to the earlier of (A) 60 days after
the  commencement  and (B) May 31, 2000, or (3) the entry of an order for relief
against the Company prior to May 31, 2000, under any bankruptcy law in effect at
any time.

          3.  Independent   Construction   Consultant   Certificate.   Upon  the
occurrence of each  Contribution  Event occuring under Sections 2(i),  2(ii) and
2(iii) above (after,  with respect to Section 2(iii) only, the expiration of the
ten  day  period  set  forth  in  subsection  (b)  thereof),   the   Independent
Construction  Consultant  shall  provide the Company and Riviera  Holdings  with
written notice setting forth its  determination  of the Funding Amounts required
to be  contributed  to the Company  pursuant to Section 1 hereof with respect to
such Contribution Event and the basis of its determination.

                                       2


          4. Company's  Certificate.  Upon the  occurrence of each  Contribution
Event  occuring under Sections  2(iv),  2(v) and 2(vi) above,  the Company shall
provide written notice to Riviera  Holdings of such  Contribution  Event setting
forth its determination of the Funding Amounts required to be contributed to the
Company pursuant to Section 1 hereof with respect to such Contribution Event and
the basis of its determination.

          5.  Cooperation.  In connection with this Agreement,  Riviera Holdings
agrees, at its sole cost and expense, to fully cooperate with the Company and to
timely provide such documents,  agreements and information as may be required in
connection herewith.

          6. Ability to Comply With This Agreement.  Riviera  Holdings shall, at
all  times  prior  to the  fulfillment  of all of  its  obligations  under  this
Agreement,  ensure that it has the  ability to fulfill  all of such  obligations
under all other agreements to which it is a party, including the Indenture dated
as of August  13,  1997,  among  Riviera  Holdings,  the  subsidiary  guarantors
identified therein and Norwest Bank Minnesota, National Association, as trustee,
relating to the issuance of $175,000,000  principal amount of 10% First Mortgage
Notes due 2004 of Riviera Holdings.

          In  addition,  Riviera  Holdings  shall not,  at any time prior to the
fulfillment of all of its  obligations  under this  Agreement,  permit any other
agreement to which it is a party to in any way  prohibit or  interfere  with its
ability to fulfill its obligations under this Agreement.

          7. Alteration of Obligations. Riviera Holdings acknowledges and agrees
that none of the following shall release,  impair, reduce, diminish or otherwise
affect Riviera Holdings' obligations under this Commitment:  (i) any alteration,
compromise,  acceleration  or extension  of, or any change to, (a) the Company's
obligations  to complete  the  development,  construction  and  equipping of the
Riviera  Black Hawk and to  commence  operation  thereof  or (b) the  payment or
performance by the Company or any guarantor  under any debt  instrument or other
financing  for the  development,  construction,  equipping  or  operation of the
Riviera Black Hawk (the foregoing,  collectively,  the  "Obligations"),  in each
case in such manner, upon such terms and at such times as any Person (including,
without limitation,  the Trustee or any Holder) (each such Person, an "Obligee")
deems best,  and  without  notice to Riviera  Holdings;  (ii) the release of the
Company or any guarantor  from any or all of the  Obligations by acceptance of a
deed  in lieu of  foreclosure  or  otherwise,  as to all or any  portion  of the
Obligations;  (iii) the  release,  substitution  or  addition of any one or more
guarantors  or endorsers  of the Funding  Amounts or the  Obligations;  (iv) the
acceptance of additional or substitute  security for the Funding  Amounts or the
Obligations; or (v) the release or subordination of any security for the Funding
Amounts  or  the  Obligations.  No  exercise  (including,   without  limitation,
foreclosure  of the  Property) or  non-exercise  of any right under any document
relating to the Obligations  (collectively,  the  "Obligation  Documents") by an
Obligee,  no dealing by an Obligee hereunder or under any Obligation Document or
any other document with Riviera Holdings, the Company or any other guarantors or
any other Person, and no change,  impairment or release of all or any portion of
the Funding  Amounts or the  Obligations or suspension of any right or remedy of
an Obligee against any other Person, including,  without limitation, the Company
or any other such guarantor,  endorser or other Person,  shall in any way affect
any of the obligations of Riviera Holdings  hereunder or any security  furnished
by Riviera  Holdings or give Riviera  Holdings  any recourse  against an Obligee
(including,  without limitation,

                                       3


the Trustee).  If an Obligee has exculpated or hereafter  exculpates the Company
from  liability in whole or in part,  or has agreed or hereafter  agrees to look
solely  to the  Property  or any  other  property  for the  satisfaction  of the
Company's Obligations  (including,  without limitation the Company's obligations
under the Indenture, the Notes or any Collateral Document), such exculpation and
agreement  shall not  affect the  obligations  of  Riviera  Holdings  hereunder.
Riviera  Holdings  further  acknowledges  that any such exculpation or agreement
that has been given or that is  hereafter  given to the Company  with respect to
the Notes,  the Indenture or any Collateral  Document has been given or is given
in reliance upon the covenants of Riviera Holdings contained herein.

          8. Obligations  Absolute;  Waiver. The obligations of Riviera Holdings
hereunder  shall be  unconditional  (except as to any  condition set forth under
Sections 1 and 2), absolute and continuing and,  without limiting the generality
of the foregoing, shall not be released, discharged or otherwise affected by and
shall survive,  and Riviera  Holdings hereby waives and  relinquishes all rights
and remedies accorded by applicable law to sureties or guarantors and agrees not
to assert or take advantage of any such rights or remedies,  including,  without
limitation,  (a) any right to require any holder or  recipient of the benefit of
any of the  Obligations  (including,  without  limitation,  the  Trustee  or the
Holders) (each a "Benefited  Party") to proceed against the Company or any other
Person or  entity or to  proceed  against  or  exhaust  any  security  held by a
Benefited  Party at any time or to  pursue  any  other  remedy in the power of a
Benefited Party before proceeding  against Riviera Holdings;  (b) the defense of
the  statute of  limitations  in any action  hereunder  or in any action for the
collection or performance  of the Funding  Amounts or the  Obligations;  (c) any
defense that may arise by reason of the incapacity,  lack of authority, death or
disability  of any other  Person or the failure of a Benefited  Party to file or
enforce a claim against the estate (in  administration,  bankruptcy or any other
proceeding) of any other Person;  (d)  appraisal,  valuation,  stay,  extension,
marshaling of assets, redemption,  exemption,  diligence,  demand,  presentment,
protest and notice of any kind,  including,  without  limitation,  notice of the
existence,  creation  or  incurring  of any new or  additional  indebtedness  or
obligation or of any action,  non-action,  performance  or failure to perform on
the part of a Benefited  Party,  the  Company,  any  endorser or creditor of the
Company or Riviera Holdings or on the part of any other Person under this or any
other  instrument in connection  with any obligation or evidence of indebtedness
held by a  Benefited  Party as  collateral  or in  connection  with the  Funding
Amounts or the Obligations; (e) any defense based upon any exercise of remedies,
including without limitation,  foreclosure of the Property,  or upon an election
of remedies by a Benefited Party, including,  without limitation, an election to
proceed by  non-judicial  rather than judicial  foreclosure,  which  destroys or
otherwise  impairs  the  subrogation  rights of Riviera  Holdings,  the right of
Riviera  Holdings  to  proceed  against  the  Company  or any other  person  for
reimbursement,  or both;  (f) any defense  based upon any statute or rule of law
which  provides that the obligation of a surety must be neither larger in amount
nor in other respects more burdensome  than that of the principal;  (g) any duty
on the part of a Benefited  Party to disclose  to Riviera  Holdings  any facts a
Benefited Party may now or hereafter know about the Company or any other Person,
regardless  of whether a  Benefited  Party has  reason to believe  that any such
facts materially increase the risk beyond that which Riviera Holdings intends to
assume,  or has  reason to  believe  that  such  facts are  unknown  to  Riviera
Holdings,  or has a reasonable  opportunity to communicate such facts to Riviera
Holdings,  since Riviera  Holdings  acknowledges  that Riviera Holdings is fully
responsible  for being and keeping  informed of the  financial  condition of the
Company  or any other  Person  and of all

                                       4


circumstances bearing on the risk of non-payment of any Funding Amounts; (h) any
defense arising because of the election of a Benefited  Party, in any proceeding
instituted  under the Federal  Bankruptcy  Code, of the  application  of Section
1111(b)(2)  of the  Federal  Bankruptcy  Code;  (i) any  defense  based upon any
borrowing  or grant of a security  interest  under  Section  364 of the  Federal
Bankruptcy  Code;  (j) any claim or other  rights  which it may now or hereafter
acquire  against the Company or any other Person that arises from the  existence
or performance of Riviera  Holdings'  obligations  under this  Commitment or any
other  Obligation  Document,   including,   without  limitation,  any  right  of
subrogation,  reimbursement,  exoneration,  contribution,  indemnification,  any
right to  participate  in any claim or remedy by a Benefited  Party  against the
Company or any collateral which a Benefited Party now has or hereafter acquires,
whether or not such claim,  remedy or right arises in equity or under  contract,
statute or common law, by any payment made  hereunder or  otherwise,  including,
without  limitation,  the right to take or receive from the Company or any other
Person or  entity,  directly  or  indirectly,  in cash or other  property  or by
set-off or in any other manner,  payment or security on account of such claim or
other rights;  (k) any rights which it may acquire by way of contribution  under
this  Commitment or any  Obligation  Document,  by any payment made hereunder or
otherwise,  including, without limitation, the right to take or receive from any
other Person, directly or indirectly, in cash or other property or by set-off or
in any other manner, payment or security on account of such contribution rights;
(l)  any  defense  based  on  one-action  laws  and  any  other  anti-deficiency
protections  granted  to  guarantors  by  applicable  law;  (m)  any  merger  or
consolidation  of the Company into or with any other Person,  or any sale, lease
or transfer of any or all of the assets of the Company to any other Person;  (n)
any circumstance  which might constitute a defense  available to, or a discharge
of,  the  Company,  Riviera  Holdings  or a surety;  (o) any lack of  genuiness,
validity,  regularity,  enforceability  or value of any  Funding  Amounts,  this
Commitment or any Obligation  Document;  and (p) any other fact or circumstance,
including, without limitation, any construction delays or any contests or claims
relating to the  construction  of the  Riviera  Black  Hawk.  Any  proceeds of a
foreclosure  or similar  sale may be  applied  first to any  obligations  of the
Company that do not also  constitute  Funding  Amounts or  Obligations.  Riviera
Holdings  acknowledges  and agrees that any nonrecourse or exculpation  provided
for in any Obligation Document, or any other provision of an Obligation Document
limiting each respective  Benefited  Party's recourse to specific  collateral or
limiting such Benefited  Party's right to enforce a deficiency  judgment against
the  Company,  shall  have  absolutely  no  application  to  Riviera  Holdings's
liability  under  this  Commitment.  To the  extent  that  any  Benefited  Party
(including,  without  limitation,  the Trustee) collects or receives any sums or
payments from the Company or from any guarantor,  endorser or other Person under
any  Obligation  Document or realized from any security,  such  Benefited  Party
shall have the right,  but not the  obligation,  to apply such amounts  first to
that portion of the  Company's  indebtedness  and  obligations,  if any, to such
Benefited Party that is not covered by this Commitment, regardless of the manner
in which any such  payments or amounts are  characterized  by the Person  making
payment. Nothing herein shall be construed to be a waiver by Riviera Holdings of
any defense based on the occurrence or non-occurrence of a Contribution Event or
as to the Funding Amount.

                                       5


          9.  Bankruptcy  and Related  Proceedings.  The  obligations of Riviera
Holdings under this Commitment  shall not be altered,  limited or affected by or
as a result of any action taken by the Company in any  proceeding,  voluntary or
involuntary, involving the bankruptcy, reorganization, insolvency, receivership,
or liquidation  of the Company,  or by any defense which the Company may have by
reason of any order,  decree or  decision  of any court or  administrative  body
resulting from any such proceeding.

          10.  Interest.  If Riviera Holdings fails to pay all or any portion of
the Funding Amounts in accordance with the provisions hereof, the amount of such
Funding Amounts and all other sums payable by Riviera  Holdings  hereunder shall
bear  interest  from the date of demand at the highest  rate  applicable  to the
principal balance of the Notes.

          11.  Independent  Obligations.  The  obligations  of Riviera  Holdings
hereunder are independent of the obligations of the Company or any other Person,
and, in the event of any default hereunder,  a separate action or actions may be
brought and prosecuted  against Riviera Holdings,  whether or not the Company or
such other Person is joined therein or a separate  action or actions are brought
against the Company.

          12. Notices.  Whenever Riviera Holdings or the Company shall desire to
give or serve any notice, demand, request or other communication with respect to
this  Commitment,  each such notice  shall be in writing and shall be  effective
only if the same is delivered by hand-delivery,  first-class mail (registered or
certified,  return receipt  requested),  telecopier or air courier  guaranteeing
overnight delivery, addressed as follows:

                  To Riviera Holdings:

                     Riviera Holdings Corporation
                     2701 Las Vegas Boulvard South
                     Las Vegas, Nevada 89109
                     Attention: Executive Vice President of Finance
                     Telephone: (702) 734-5110
                     Facsimile: (702) 734-9277

                  To the Company:

                     Riviera Black Hawk, Inc.
                     444 Main Street
                     Black Hawk, Colorado 80422
                     Attention: Executive Vice President of Finance
                     Telephone: (702) 734-5110
                     Facsimile: (702) 734-9277

                                       6


          and, in either case, with a copy to the Trustee at:

                     IBJ Whitehall Bank & Trust Company
                     One State Street
                     New York, New York 10004
                     Attention:  Thomas S. Moser
                     Telephone: (212) 858-2558
                     Facsimile: (212) 858-2956

Any such notice delivered  personally shall be deemed to have been received upon
delivery.  Any such  notice  sent by  telegram  shall be  presumed  to have been
received by the addressee one business day after its  acceptance  for sending by
an authorized carrier thereof. Any such notice sent by mail shall be presumed to
have been  received by the  addressee  three  business days after posting in the
United  States mail.  Riviera  Holdings or the Company may change its address by
giving the other and the  Trustee a written  notice of the new address as herein
provided.

          13. Successors and Assigns. This Commitment shall inure to the benefit
of the Company,  its successors  and assigns,  and shall bind the successors and
assigns of Riviera Holdings.

          14.  Termination.  This Commitment  shall expire upon the later of (i)
the final disbursement of amounts in the Cash Collateral  Accounts in accordance
with the Cash Collateral and Disbursement Agreement and (ii) May 31, 2000.

          15. No Guarantee. Nothing contained in this Commitment shall be deemed
to be a guarantee by Riviera  Holdings of any  obligations  of the Company under
the Notes.

          16. Miscellaneous Provisions.

               16.1  This  Commitment  shall be  governed  by and  construed  in
          accordance  with the laws of the State of New York.  Riviera  Holdings
          hereby consents to the  jurisdiction of the courts of the State of New
          York and consents to service of process by any means authorized by New
          York law in any action brought under or arising from this Commitment.

               16.2  Riviera  Holdings  acknowledges  that  it is  aware  of the
          Indenture  entered  into by the  Company  and the  Trustee,  the Notes
          issues thereunder and the Collateral  Documents executed in connection
          therewith  and is  generally  familiar  with the terms and  provisions
          thereof.

               16.3 This  Commitment  shall  constitute the entire  agreement of
          Riviera  Holdings with the Company with respect to the subject  matter
          hereof,  and no  representation,  understanding,  promise or condition
          concerning the subject matter hereof shall be binding upon the Company
          unless expressed herein.

                                       7



               16.4 Should any term,  covenant,  condition  or provision of this
          Commitment  be determined  to be illegal or  unenforceable,  all other
          terms, covenants,  conditions and provisions hereof shall nevertheless
          remain in full force and effect.

               16.5 When the context and construction so require, all words used
          in the  singular  herein  shall be deemed to include the  plural,  the
          masculine shall include the feminine and neuter, and vice versa.

               16.6 No  provision  of this  Commitment  or right  granted to the
          Company  hereunder can be waived in whole or in part,  nor can Riviera
          Holdings  be  released  from its  obligations  hereunder,  except by a
          writing duly executed by an authorized officer of the Company.

               16.7 The headings of this Commitment are inserted for convenience
          only and shall have no effect upon the construction or  interpretation
          hereof.

                            (Signature Page Follows)

                                       8


          IN WITNESS  WHEREOF,  the parties have executed this  Commitment as of
the date first written above.

                          RIVIERA HOLDINGS CORPORATION,
                          a Nevada corporation



                          By:
                              --------------------------
                          Name:
                          Title:


                          RIVIERA BLACK HAWK, INC.,
                          a Colorado corporation



                          By:
                              --------------------------
                          Name:
                          Title:












               [Signature Page to Completion Capital Commitment]