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

                                December 3, 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"), for up to 7,500,000 shares of
the Company's common stock, par value $.000001 per share (the "Common Stock").

     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 Common Stock, when sold in the manner described in the Registration
Statement, will be legally and 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 constituting 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