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


                                January 16, 2002

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 133,690 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 Amended and Restated 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 133,690 shares of Common Stock being registered for the account of
certain of the Company's stockholders have been duly authorized and are 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