Exhibit 5.1


                 ROBINSON SILVERMAN PEARCE ARONSOHN & BERMAN LLP
                           1290 AVENUE OF THE AMERICAS
                            NEW YORK, NEW YORK 10104
                                 (212) 541-2000

                            FACSIMILE: (212) 541-4630


                                 October 16, 2001


Activision, Inc.
3100 Ocean Park Blvd.
Santa Monica, CA  90405

          Re:  Activision, Inc.
               Registration Statement on Form S-3
               ----------------------------------

Ladies and Gentlemen:

     We refer to the Registration Statement on Form S-3 (the "Registration
Statement") to be filed by Activision, Inc., a Delaware corporation (the
"Company"), on or about the date hereof with the Securities and Exchange
Commission (the "Commission") in connection with the registration under the
Securities Act of 1933, as amended (the "Act"), with respect to 770,051 shares
of the Company's common stock, par value $.000001 per share (the "Common Stock")
held by certain of the Company's stockholders.

     We are familiar with the Amended and Restated Certificate of Incorporation,
as amended, and the By-laws of the Company and have examined originals or
copies, certified or otherwise identified to our satisfaction, of such other
documents, evidence of corporate action, certificates and other instruments, and
have made such other investigations of law and fact, as we have deemed necessary
or appropriate for the purposes of this opinion.

     Based upon the foregoing, it is our opinion that:

     (a) The Company has been duly incorporated and is validly existing under
the laws of the State of Delaware.

     (b) The 770,051 shares of Common Stock being registered for the account of
certain of the Company's stockholders have been duly authorized and are, or when
issued in accordance with the terms of the Agreement and Plan of Merger dated as
of September 28, 2001, among the Company and other parties thereto, will be,
validly issued, fully paid and nonassessable.

     We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the use of our name wherever appearing in such
Registration Statement, including the Prospectus consisting a part thereof, and
any amendment thereto. In giving this consent, we do not thereby admit that we
are in the category of persons whose consent is required under Section 7 of the
Act, or the Rules and Regulations of the Commission thereunder.

                          Very truly yours,


                          /s/ Robinson Silverman Pearce
                              Aronsohn & Berman LLP