Filed Pursuant to Rule 424(b)(3)
                                        Registration No. 333-46425

PROSPECTUS SUPPLEMENT
(To Prospectus dated April 22, 1998)



                              ACTIVISION, INC.


                                 $60,000,000
               6 3/4% Convertible Subordinated Notes Due 2005


                      3,178,808 Shares of Common Stock

                         ---------------------------

          This Prospectus Supplement relates to the resale of (i) up to
$60,000,000 aggregate principal amount of 6 3/4% Convertible Subordinated
Notes Due 2005 (the "Notes") of Activision, Inc., a Delaware corporation (the
"Company"), and (ii) up to 3,178,808 shares of Common Stock, $.000001 par
value (the "Common Stock"), of the Company, which are initially issuable upon
conversion of the Notes by any holders thereof (the "Shares" and together
with the Notes, the "Securities").  The Securities may be offered from time
to time for the accounts of holders named herein, in the Prospectus dated
April 22, 1998 (the "Prospectus"), or in additional supplements to the
Prospectus (the "Selling Securityholders"). This Prospectus Supplement
reflects the purchase of Notes by various Selling Securityholders since the
date of the Prospectus.

     The Notes are convertible, in whole or in part, at the option of the
Selling Securityholder at any time prior to the close of business on the
business day immediately preceding January 1, 2005, unless previously
redeemed or repurchased, into shares of Common Stock, at a conversion price
of $18.8750 per share (equivalent to a conversion rate of 52.9801 shares per
$1,000 principal amount of Notes), subject to adjustment in certain
circumstances.  The Common Stock of Activision, Inc. is traded on the Nasdaq
National Market ("NASDAQ") under the symbol "ATVI."  On July 12,1999, the
last sale price for the Common Stock as reported on NASDAQ was $14.625 per
share.

     The Company will not receive any of the proceeds from the sale of the
Securities being offered by the Selling Securityholders.  The Securities may
be offered in negotiated transactions or otherwise, at market prices
prevailing at the time of sale or at negotiated prices.  In addition, the
Shares may be offered from time to time through ordinary brokerage
transactions on NASDAQ. See "Plan of Distribution" in the Prospectus.  The
Selling Securityholders and any brokers, dealers or agents that participate
with the Selling Securityholders in the distribution of the Notes or Shares
may be deemed to be "Underwriters" within the meaning of the Securities Act,
in which case any commissions received by such brokers-dealers, agents or
underwriters and any profit on the resale of the Notes or Shares purchased by
them may be deemed to be underwriting commissions or discounts under the
Securities Act.


          THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
THE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR
ADEQUACY OF THIS PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.



          The date of this Prospectus Supplement is July 13, 1999.

                           SELLING SECURITYHOLDERS

          The Notes were originally issued by the Company in a private
placement in December 1997 and were resold by the initial purchasers thereof
to qualified institutional buyers (within the meaning of Rule 144A under the
Securities Act) or other institutional accredited investors (as defined in
Rule 501(a)(1), (2), (3) or (7) under the Securities Act) in transactions
exempt from registration under the Securities Act of 1933, as amended (the
"Securities Act"), and in sales outside the United States to persons other
than U.S. persons in reliance upon Regulation S under the Securities Act.
The Notes and the Common Stock issuable upon conversion thereof that may be
offered pursuant to this Prospectus Supplement will be offered by the Selling
Securityholders.

          The following table, which sets forth certain information regarding
the beneficial ownership of Notes by the Selling Securityholders and the
number of shares of Common Stock issuable upon conversion of the Notes as of
July 13, 1999, has been updated from the table contained in the Prospectus to
include certain additional Selling Securityholders.

          Any or all of the Notes or Shares listed below may be offered for
sale pursuant to this Prospectus Supplement by the Selling Securityholders
from time to time.  Accordingly, no estimate can be given as to the amount of
the Notes or Shares that will be held by the Selling Securityholders upon
consummation of any such sales.  In addition, the Selling Securityholders
identified below may have sold, transferred or otherwise disposed of all or a
portion of their Notes since the date on which the information regarding
their Notes was provided, in transactions exempt from the registration
requirements of the Securities Act.  The table has been prepared based on
information furnished to the Company by or on behalf of the Selling
Securityholders.

                                                        Number of  Percent-
                                             Percentage Shares of    age of
                                              of Shares   Common     Common
                                    Percent-    Into      Stock      Stock
                                     age of   Which the   Owned      Owned
                                      Notes   Notes are   Before     After
                        Principal     Out-     Convert-    the       the
                          Amount    standing     ible    Offering  Offering
Name                   of Notes(1)     (1)        (2)       (3)       (4)
- ----                   -----------  --------   -------- ---------  --------

J.P. Morgan & Co.       $3,000,000      5.0%    158,940    10,700         *
  Incorporated
522 Fifth Avenue
New York, NY  10036

General Motors          $1,000,000      1.7%     52,980         0        0%
  Employees
Domestic Group
  Pension Trust
c/o General Motors
  Investment
767 Fifth Avenue
16th Floor
New York, NY  10153
Credit Suisse           $9,375,000     15.6%    496,688         0        0%
  First Boston
  Corporation
5 World Trade Center
New York, NY  10048

California Public       $1,500,000      2.5%     79,470         0        0%
  Employees
  Retirement System
1001 Marina Village
 Parkway
Third Floor
Alameda, CA  94501

Seligman Global           $165,000         *      8,741    16,000         *
  Horizons Fund
c/o J.&W. Seligman
  & Co. Incorporated
100 Park Avenue
New York, NY  10017

Seligman                  $190,000         *     10,066    19,600         *
  Communications &
  Information
  Portfolio
c/o J.&W. Seligman
  & Co. Incorporated
100 Park Avenue
New York, NY  10017

Seligman               $10,000,000       17%    529,801 1,000,000      4.4%
  Communication
  & Information Fund
c/o J.&W. Seligman
  & Co. Incorporated
100 Park Avenue
New York, NY  10017

Drew University            $20,000         *      1,059         0        0%
c/o Bank of New York
Drew University Acct.
  #598600
1 Wall Street,
26th Floor
New York, NY  10286

Baptist Health            $133,000         *      7,046         0        0%
c/o Nicholas-
  Applegate Capital
  Mgmt.
600 W. Broadway
32nd Floor
San Diego, CA  92101

Nicholas-Applegate      $1,900,000      3.2%    100,662         0        0%
  Income & Growth
  Fund
c/o Nicholas-Applegate
  Capital Mgmt.
600 W. Broadway
32nd Floor
San Diego, CA  92101

Wake Forest               $410,000         *     21,721         0        0%
  University
c/o Nicholas-
  Applegate Capital
   Mgmt.
600 W. Broadway
32nd Floor
San Diego, CA  92101

Engineers Joint           $208,000         *     11,019         0        0%
  Pension Fund
c/o Nicholas-
  Applegate
  Capital Mgmt.
600 W. Broadway
32nd Floor
San Diego, CA  92101

Boston Museum              $56,000         *      2,966         0        0%
  of Fine Arts
c/o Nicholas-
  Applegate
  Capital Mgmt.
600 W. Broadway
32nd Floor
San Diego, CA  92101

San Diego County        $1,729,000      2.9%     91,602         0        0%
  Convertible
c/o Nicholas-
  Applegate
  Capital Mgmt.
600 W. Broadway
32nd Floor
San Diego, CA  92101

San Diego City            $564,000         *     29,880         0        0%
  Retirement
c/o Nicholas-
  Applegate
  Capital Mgmt.
600 W. Broadway
32nd Floor
San Diego, CA  92101

Oregon Public           $2,000,000      3.3%    105,960         0        0%
  Employee
  Retirement Fund
227 West Monroe
Suite 3000
Chicago, IL  60606

Acorn Fund             $13,000,000     21.7%    688,741         0        0%
227 West Monroe
Suite 3000
Chicago, IL  60606

Franklin Investors      $4,000,000      6.7%    211,920         0        0%
  Securities
  Trust -
  Convertible
  Securities Fund
777 Mariners
  Island Blvd.
  7th Floor
San Mateo, CA  94404

FSS - Franklin          $5,000,000      8.3%    264,900      1,344,600 5.9%
  Small Cap
   Growth Fund
777 Mariners
  Island Blvd.
  7th Floor
San Mateo, CA  94404

Franklin U.S.             $100,000      *         5,298     9,900      *
  Small Cap
  Growth Fund (Canada)
c/o Templeton Management
   Limited
1 Adelaide Street East
  27th Fl.
Toronto, Ontario
Canada,  M5C 3B8

FSS - Franklin          $3,000,000      5.0%    158,940      390,000   1.7%
  California
  Growth Fund
777 Mariners
  Island Blvd.
  7th Floor
San Mateo, CA  94404

Argent Classic          $1,500,000      2.5%     79,470         0        0%
  Convertible
  Arbitrage Fund
  (Bermuda) L.P.
10 Queen Stret
Hamilton, Bermuda HMEX

Helix Convertible         $230,000         *     12,185         0        0%
  Opportunities
   Fund Ltd.
c/o Helix Investment
  Partners L.P.
1930 Century Park West
Ste. 302
Los Angeles, CA  90067

Common Fund FAO Absolute    $50,000        *      2,649         0        0%
  Return Fund
c/o Helix Investment
  Partners L.P.
1930 Century Park West
Ste. 302
Los Angeles, CA  90067

Helix Convertibles        $100,000         *      5,298         0        0%
  Opportunities L.P.
c/o Helix Investment
  Partners L.P.
1930 Century Park West
Ste. 302
Los Angeles, CA  90067

World Wide Transactions Ltd.    $25,000    *      1,324         0        0%
c/o Helix Investment
  Partners L.P.
1930 Century Park West
Ste. 302
Los Angeles, CA  90067

Simpson Group Retirement Fund  $50,000     *      2,649         0        0%
c/o Helix Investment
Partners L.P.
1930 Century Park West
Ste. 302
Los Angeles, CA  90067

WR Investment Partners L.P.    $25,000     *      1,324         0        0%
c/o Helix Investment
Partners L.P.
1930 Century Park West
Ste. 302
Los Angeles, CA  90067

Shepherd Management        $20,000         *      1,059         0        0%
  Services
c/o Helix Investment
  Partners L.P.
1930 Century Park West
Ste. 302
Los Angeles, CA  90067


Security Insurance      $1,000,000      1.7%     52,980         0        0%
  Company
  of Hartford
9 Farm Springs Road
Farmington, CT  06032

Sage Capital              $650,000      1.1%     34,437         0        0%
314 S. River Street
Harley, ID 83333

California Public       $3,500,000      5.8%    185,430         0        0%
  Employees
  Retirement System
400 P Street
Sacramento, CA 95814

Warburg Dillon Read LLC   $500,000         *     26,490         0        0%
677 Washington Blvd., 9-N
Stamford, CT 06912
________________

*    Less than 1%.

(1)  The information set forth herein is as of July 13, 1999 and is based
     upon $60.0 million aggregate principal amount of Notes outstanding.
(2)  Assumes conversion of the full amount of Notes held by such Selling
     Securityholder at the initial conversion price of $18.8750 per share;
     such conversion price is subject to adjustment as described under
     "Description of Notes - Conversion Rights" in the Prospectus.
     Accordingly, the number of Shares issuable upon conversion of the Notes
     may increase or decrease from time to time.  Fractional shares will not
     be issued upon conversion of the Notes; cash will be paid in lieu of
     fractional shares, if any.
(3)  Does not include the Shares issuable upon conversion of the Notes.
(4)  Percentages are based on 22,982,248 shares of Common Stock that were
     issued and outstanding as of June 25, 1999 before taking into account
     any of the assumed conversions.

     The information concerning the Selling Securityholders may change from
time to time.  Any material changes will be set forth in one or more
additional supplements to the Prospectus.

     Other than their ownership of the Company's securities, none of the
Selling Securityholders has had any material relationship with the Company
within the past three (3) years, other than Credit Suisse First Boston
Corporation, Piper Jaffray, Inc. and UBS Securities LLC, which have acted as
initial purchasers and/or underwriters for the Company.