EXHIBIT 10(b)

                             SHAREHOLDERS AGREEMENT

               AGREEMENT, dated February 19, 1996 (this "Agreement"), by
     and among CUC INTERNATIONAL INC., a Delaware corporation ("Parent"),
     and each of the other parties signatory hereto (each, a "Shareholder"
     and, collectively, the "Shareholders").

                              W I T N E S S E T H:
                              -------------------
               WHEREAS, concurrently herewith, Parent, LARRY ACQUISITION
     CORP., a Delaware corporation and a direct wholly-owned subsidiary of
     Parent ("Merger Sub"), and SIERRA ON-LINE, INC., a Delaware
     corporation (the "Company"), are entering into an Agreement and Plan
     of Merger (as such agreement may hereafter be amended from time to
     time, the "Merger Agreement;" capitalized terms used and not defined
     herein have the respective meanings ascribed to them in the Merger
     Agreement) pursuant to which Merger Sub will be merged with and into
     the Company (the "Merger");

               WHEREAS, each of the Shareholders owns the number of shares,
     par value $.01 per share, of common stock of the Company (the "Shares"
     or "Company Common Stock") set forth opposite such Shareholder's name
     on Schedule I hereto;

               WHEREAS, as an inducement and a condition to entering into
     the Merger Agreement, Parent has required that the Shareholders agree,
     and the Shareholders have agreed, to enter into this Agreement;

               NOW, THEREFORE, in consideration of the foregoing and the
     mutual premises, representations, warranties, covenants and agreements
     contained herein, the parties hereto hereby agree as follows:

               1.   Provisions Concerning Company Common Stock.  Each
                    ------------------------------------------
     Shareholder hereby agrees that during the period commencing on the
     date hereof and continuing until the first to occur of the Effective
     Time and termination of the Merger Agreement in accordance with its
     terms, at any meeting of the holders of Company Common Stock, however
     called, or in connection with any written consent of the holders of
     Company Common Stock, such Shareholder shall vote (or cause to be
     voted) the Shares held of record or Beneficially Owned (as defined
     below) by such Shareholder, whether heretofore owned or hereafter
     acquired, (i) in favor of approval of the Merger Agreement and any
     actions required in furtherance thereof and hereof; (ii) against any
     action or agreement that would result in a breach in any respect of
     any covenant, representation or warranty or any other obligation or
     agreement of





     

     the Company under the Merger Agreement (after giving effect to any
     materiality or similar qualifications contained therein); and
     (iii) except as otherwise agreed to in writing in advance by Parent,
     against the following actions (other than the Merger and the
     transactions contemplated by the Merger Agreement):  (A) any
     extraordinary corporate transaction, such as a merger, consolidation
     or other business combination involving the Company; (B) a sale, lease
     or transfer of a material amount of assets of the Company, or a
     reorganization, recapitalization, dissolution or liquidation of the
     Company; (C) (1) any change in a majority of the persons who
     constitute the board of directors of the Company; (2) any change in
     the present capitalization of the Company or any amendment of the
     Company's Certificate of Incorporation or By-Laws; (3) any other
     material change in the Company's corporate structure or business; or
     (4) any other action which, in the case of each of the matters
     referred to in clauses C (1), (2), (3) or (4), is intended, or could
     reasonably be expected, to impede, interfere with, delay, postpone, or
     materially adversely affect the Merger and the transactions
     contemplated by this Agreement and the Merger Agreement.  Such
     Shareholder shall not enter into any agreement or understanding with
     any Person (as defined below) the effect of which would be
     inconsistent or violative of the provisions and agreements contained
     in Section 1 or 2 hereof.  For purposes of this Agreement,
     "Beneficially Own" or "Beneficial Ownership" with respect to any
     securities shall mean having "beneficial ownership" of such securities
     (as determined pursuant to Rule 13d-3 under the Securities Exchange
     Act of 1934, as amended (the "Exchange Act")), including pursuant to
     any agreement, arrangement or understanding, whether or not in
     writing.  Without duplicative counting of the same securities by the
     same holder, securities Beneficially Owned by a Person shall include
     securities Beneficially Owned by all other Persons with whom such
     Person would constitute a "group" as within the meanings of Section
     13(d)(3) of the Exchange Act.  For purposes of this Agreement,
     "Person" shall mean an individual, corporation, partnership, joint
     venture, association, trust, unincorporated organization or other
     entity.



               2.   Other Covenants, Representations and Warranties.  Each
                    -----------------------------------------------
     Shareholder hereby represents and warrants to Parent as follows:

               (a)  Ownership of Shares.  Such Shareholder is the record
                    -------------------
     and Beneficial Owner of the number of Shares set forth opposite such
     Shareholder's name on Schedule I hereto.  On the date hereof, the
     Shares set forth opposite such Shareholder's name on Schedule I hereto
     constitute all of the Shares owned of record or Beneficially Owned by
     such Shareholder.  Such Shareholder has sole voting power and sole
     power to issue instructions with respect to the matters set forth in
     Section 1 hereof, sole power of disposition, sole power of conversion,
     sole power to demand appraisal rights and sole power to agree to all
     of the matters set forth in this Agreement, in each case with respect
     to all of the Shares set





     

     forth opposite such Shareholder's name on Schedule I hereto, with no
     limitations, qualifications or restrictions on such rights.

               (b)  Power; Binding Agreement.  Such Shareholder has the
                    ------------------------
     legal capacity, power and authority to enter into and perform all of
     such Shareholder's obligations under this Agreement.  The execution,
     delivery and performance of this Agreement by such Shareholder will
     not violate any other agreement to which such Shareholder is a party
     including, without limitation, any voting agreement, shareholder
     agreement or voting trust.  This Agreement has been duly and validly
     executed and delivered by such Shareholder and constitutes a valid and
     binding agreement of such Shareholder, enforceable against such
     Shareholder in accordance with its terms.  There is no beneficiary or
     holder of a voting trust certificate or other interest of any trust of
     which such Shareholder is Trustee whose consent is required for the
     execution and delivery of this Agreement or the consummation by such
     Shareholder of the transactions contemplated hereby.  If such
     Shareholder is married and such Shareholder's Shares constitute
     community property, this Agreement has been duly authorized, executed
     and delivered by, and constitutes a valid and binding agreement of,
     such Shareholder's spouse, enforceable against such person in
     accordance with its terms.

               (c)  No Conflicts.  (A) No filing with, and no permit,
                    ------------
     authorization, consent or approval of, any state or federal public
     body or authority is necessary for the execution of this Agreement by
     such Shareholder and the consummation by such Shareholder of the
     transactions contemplated hereby and (B) none of the execution and
     delivery of this Agreement by such Shareholder, the consummation by
     such Shareholder of the transactions contemplated hereby or compliance
     by such Shareholder with any of the provisions hereof shall (1) result
     in a violation or breach of, or constitute (with or without notice or
     lapse of time or both) a default (or give rise to any third party
     right of termination, cancellation, material modification or
     acceleration) under any of the terms, conditions or provisions of any
     note, bond, mortgage, indenture, license, contract, commitment,
     arrangement, understanding, agreement or other instrument or
     obligation of any kind to which such Shareholder is a party or by
     which such Shareholder or any of such Shareholder's properties or
     assets may be bound, or (2) violate any order, writ, injunction,
     decree, judgment, order, statute, rule or regulation applicable to
     such Shareholder or any of such Shareholder's properties or assets.

               (d)  No Finder's Fees.  Other than existing financial
                    ----------------
     advisory and investment banking arrangements and agreements between
     the Company and Robertson, Stephens & Company LLC, no broker,
     investment banker, financial adviser or other person is entitled to
     any broker's, finder's, financial adviser's or other similar fee or
     commission in connection with the transactions contemplated by the
     Merger Agreement based upon




     

     arrangements made by or on behalf of such Shareholder or any of its
     affiliates or, to such shareholder's knowledge, the Company or any of
     its affiliates.

               (e)  Restriction on Transfer, Proxies and Non-Interference. 
                    -----------------------------------------------------
     Such Shareholder shall not, directly or indirectly:  (i) except as
     contemplated by the Merger Agreement, offer for sale, sell, transfer,
     tender, pledge, encumber, assign or otherwise dispose of, or enter
     into any contract, option or other arrangement or understanding with
     respect to or consent to the offer for sale, sale, transfer, tender,
     pledge, encumbrance, assignment or other disposition of, any or all of
     such Shareholder's Shares or any interest therein; (ii) grant any
     proxies or powers of attorney, deposit any Shares into a voting trust
     or enter into a voting agreement with respect to any Shares; or
     (iii) take any action that would make any representation or warranty
     of such Shareholder contained herein untrue or incorrect or have the
     effect of preventing or disabling such Shareholder from performing
     such Shareholder's obligations under this Agreement.

               (f)  Reliance by Parent.  Such Shareholder understands and
                    ------------------
     acknowledges that Parent is entering into, and causing Merger Sub to
     enter into, the Merger Agreement in reliance upon such Shareholder's
     execution and delivery of this Agreement.

               3.   Stop Transfer; Restrictive Legend.  (a) Each
                    ---------------------------------
     Shareholder agrees with, and covenants to, Parent that such
     Shareholder shall not request that the Company register the transfer
     (book-entry or otherwise) of any certificate or uncertificated
     interest representing any of such Shareholder's Shares, unless such
     transfer is made in compliance with this Agreement.  In the event of a
     stock dividend or distribution, or any change in the Company Common
     Stock by reason of any stock dividend, split-up, recapitalization,
     combination, exchange of shares or the like, the term "Shares" shall
     be deemed to refer to and include the Shares as well as all such stock
     dividends and distributions and any shares into which or for which any
     or all of the Shares may be changed or exchanged.

                    (b)  All certificates representing any of such
     Shareholder's Shares shall contain the following legend:

                    "The securities represented by this
                    certificate, including certain voting
                    and transfer rights with respect
                    thereto, are subject to the terms of a
                    Shareholders Agreement, dated February
                    19, 1996, among CUC International Inc.,
                    the Issuer and the parties listed on the
                    signature pages





     

                    thereto, a copy of which is on file in the principal
                    office of the Issuer."

               4.   Termination.  Except as otherwise provided herein, this
                    -----------
     Agreement shall terminate upon the earlier of (a) termination of the
     Merger Agreement in accordance with its terms and (b) the Effective
     Time.

               5.   Shareholder Capacity.  No person executing this
                    --------------------
     Agreement who is or becomes during the term hereof a director of the
     Company makes any agreement or understanding herein in his or her
     capacity as such director.  Each Shareholder signs solely in his or
     her capacity as the record and beneficial owner of such Shareholder's
     Shares.  Notwithstanding any other provision of this Agreement, no
     Shareholder shall have any obligation under this Agreement to act or
     refrain from acting in any manner inconsistent with such Shareholder's
     fiduciary duties as a director of the Company.

               6.   Confidentiality.  The Shareholders recognize that
                    ---------------
     successful consummation of the transactions contemplated by this
     Agreement may be dependent upon confidentiality with respect to the
     matters referred to herein.  In this connection, pending public
     disclosure thereof, each Shareholder hereby agrees not to disclose or
     discuss such matters with anyone not a party to this Agreement (other
     than such Shareholder's counsel and advisors, if any) without the
     prior written consent of Parent, except for disclosures such
     Shareholder's counsel advises are necessary in order to fulfill such
     Shareholder's obligations imposed by law, in which event such
     Shareholder shall give notice of such disclosure to Parent as promptly
     as practicable so as to enable Parent to seek a protective order from
     a court of competent jurisdiction with respect thereto.

               7.   Miscellaneous.
                    -------------
               (a)  Entire Agreement.  This Agreement and the Merger
                    ----------------
     Agreement constitute the entire agreement between the parties with
     respect to the subject matter hereof and supersede all other prior
     agreements and understandings, both written and oral, between the
     parties with respect to the subject matter hereof.

               (b)  Certain Events.  Each Shareholder agrees that this
                    --------------
     Agreement and the obligations hereunder shall attach to such
     Shareholder's Shares and shall be binding upon any person or entity to
     which legal or beneficial ownership of such Shares shall pass, whether
     by operation of law or otherwise, including, without limitation, such
     Shareholder's heirs, guardians, administrators or successors. 
     Notwithstanding any transfer of Shares, the




     

     transferor shall remain liable for the performance of all obligations
     under this Agreement of the transferor.

               (c)  Assignment.  This Agreement shall not be assigned by
                    ----------
     operation of law or otherwise without the prior written consent of the
     other party, provided that Parent may assign, in its sole discretion,
     its rights and obligations hereunder to any direct or indirect wholly
     owned subsidiary of Parent, but no such assignment shall relieve
     Parent of its obligations hereunder if such assignee does not perform
     such obligations.

               (d)  Amendments, Waivers, Etc.  This Agreement may not be
                    ------------------------
     amended, changed, supplemented, waived or otherwise modified or
     terminated, with respect to any one or more Shareholders, except upon
     the execution and delivery of a written agreement executed by the
     relevant parties hereto; provided that Schedule I hereto may be
                              --------
     supplemented by Parent by adding the name and other relevant
     information concerning any Shareholder of the Company who agrees to be
     bound by the terms of this Agreement without the agreement of any
     other party hereto, and thereafter such added shareholder shall be
     treated as a "Shareholder" for all purposes of this Agreement.

               (e)  Notices.  All notices, requests, claims, demands and
                    -------
     other communications hereunder shall be in writing and shall be given
     (and shall be deemed to have been duly received if so given) by hand
     delivery, telegram, telex or telecopy, or by mail (registered or
     certified mail, postage prepaid, return receipt requested) or by any
     courier service, such as Federal Express, providing proof of delivery. 
     All communications hereunder shall be delivered to the respective
     parties at the following addresses:

     If to any Shareholder:   At the addresses set forth
                              on Schedule I hereto

     with a copy to:          Perkins Coie
                              1201 Third Avenue
                              40th Floor
                              Seattle, Washington 98101-3099
                              Telephone:  (206) 583-8534
                              Facsimile:  (206) 583-8500
                              Attention:  Stephen A. McKeon, Esq.







     

     If to Parent
     or Merger Sub:           CUC International Inc.
                              707 Summer Street
                              Stamford, Connecticut  06901
                              Telephone:  (203) 324-9261
                              Facsimile:  (203) 977-8501
                              Attention:  Amy N. Lipton, Esq.

     with a copy to:          Weil, Gotshal & Manges LLP
                              767 Fifth Avenue
                              New York, New York  10153
                              Telephone:  (212) 310-8000
                              Facsimile:  (212) 310-8007
                              Attention:  Howard Chatzinoff, Esq.

     or to such other address as the person to whom notice is given may
     have previously furnished to the others in writing in the manner set
     forth above.

               (f)  Severability.  Whenever possible, each provision or
                    ------------
     portion of any provision of this Agreement will be interpreted in such
     manner as to be effective and valid under applicable law but if any
     provision or portion of any provision of this Agreement is held to be
     invalid, illegal or unenforceable in any respect under any applicable
     law or rule in any jurisdiction, such invalidity, illegality or
     unenforceability will not affect any other provision or portion of any
     provision in such jurisdiction, and this Agreement will be reformed,
     construed and enforced in such jurisdiction as if such invalid,
     illegal or unenforceable provision or portion of any provision had
     never been contained herein.

               (g)  Specific Performance.  Each of the parties hereto
                    --------------------
     recognizes and acknowledges that a breach by it of any covenants or
     agreements contained in this Agreement will cause the other party to
     sustain damages for which it would not have an adequate remedy at law
     for money damages, and therefore each of the parties hereto agrees
     that in the event of any such breach the aggrieved party shall be
     entitled to the remedy of specific performance of such covenants and
     agreements and injunctive and other equitable relief in addition to
     any other remedy to which it may be entitled, at law or in equity.




     

               (h)  Remedies Cumulative.  All rights, powers and remedies
                    -------------------
     provided under this Agreement or otherwise available in respect hereof
     at law or in equity shall be cumulative and not alternative, and the
     exercise of any thereof by any party shall not preclude the 
     simultaneous or later exercise of any other such right, power or 
     remedy by such party.

               (i)  No Waiver.  The failure of any party hereto to exercise
                    ---------
     any right, power or remedy provided under this Agreement or otherwise
     available in respect hereof at law or in equity, or to insist upon
     compliance by any other party hereto with its obligations hereunder,
     and any custom or practice of the parties at variance with the terms
     hereof, shall not constitute a waiver by such party of its right to
     exercise any such or other right, power or remedy or to demand such
     compliance.

               (j)  No Third Party Beneficiaries.  This Agreement is not
                    ----------------------------
     intended to be for the benefit of, and shall not be enforceable by,
     any person or entity who or which is not a party hereto.

               (k)  Governing Law.  This Agreement shall be governed and
                    -------------
     construed in accordance with the laws of the State of Delaware,
     without giving effect to the principles of conflicts of law thereof.

               (l)  WAIVER OF JURY TRIAL.  EACH PARTY HERETO HEREBY WAIVES
                    --------------------
     ANY RIGHT TO A TRIAL BY JURY IN CONNECTION WITH ANY SUCH ACTION, SUIT
     OR PROCEEDING.

               (m)  Descriptive Headings.  The descriptive headings used
                    --------------------
     herein are inserted for convenience of reference only and are not
     intended to be part of or to affect the meaning or interpretation of
     this Agreement.

               (n)  Counterparts.  This Agreement may be executed in
                    ------------
     counterparts, each of which shall be deemed to be an original, but all
     of which, taken together, shall constitute one and the same Agreement.




     

               IN WITNESS WHEREOF, Parent and each Shareholder have caused
     this Agreement to be duly executed as of the day and year first above
     written.


                                       CUC INTERNATIONAL INC.


                                       By: /s/  E. Kirk Shelton            
                                          ---------------------------------
                                            Name:  E. Kirk Shelton
                                            Title:  President



                                       /s/  Kenneth A. Williams            
                                       ------------------------------------
                                       Kenneth A. Williams


                                       /s/  Roberta L. Williams            
                                       ------------------------------------
                                       Roberta L. Williams


     AGREED TO AND ACKNOWLEDGED
     (with respect to Section 4):

     SIERRA ON-LINE, INC.



     By: /s/ Richard K. Thumann
        ----------------------------
          Name: Richard K. Thumann
          Title: Vice-President



     NYFS01...:\01\39801\0025\1547\AGR2136X.38C


     

                                  Schedule I to
                             Shareholders Agreement
                             ----------------------



     Name and Address                        Number of Shares Owned
     ----------------                        ----------------------
     Kenneth A. Williams and                     1,676,698
     Roberta L. Williams