Filed Pursuant to Rule 424(b)(3)
Registration No. 333-115569

Prospectus Supplement No.  8 dated March 10, 2005
(To Prospectus dated June 21, 2004)

$125,000,000
CNET Networks, Inc.
0.75% Convertible Senior Notes Due 2024
Shares of Common Stock Issuable Upon Conversion of the Notes

        This prospectus supplement supplements the prospectus dated June 21, 2004 and the prospectus supplements dated July 20, 2004, August 5, 2004, August 20, 2004, September 8, 2004, October 5, 2004, November 18, 2004 and January 31, 2005 (collectively, the “prospectus”) of CNET Networks, Inc., relating to the resale by holders of our 0.75% Convertible Senior Notes Due 2024 and the shares of our common stock issuable upon conversion of the notes.

        This prospectus supplement should be read in conjunction with the prospectus. This prospectus supplement is not complete without, and may not be delivered or utilized except in connection with, the prospectus.

        The following table sets forth information with respect to the selling securityholders and the principal amounts of notes and shares of common stock issuable upon conversion of the notes beneficially owned by each selling securityholder that may be offered pursuant to this supplement and the accompanying prospectus. The information is based solely on information provided by or on behalf of the selling securityholders. Except as set forth in the notes to the table below, none of the selling securityholders nor any of their affiliates, officers, directors or principal equity holders has held any position or office or has had any material relationship with us within the past three years.

        The selling securityholders may, pursuant to this prospectus, offer all, some or none of the notes or the common stock issuable upon conversion of the notes. As a result, we cannot estimate the amount of the notes or the common stock that will be held by the selling securityholders upon termination of any of these 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 they provided the information regarding their notes in transactions exempt from the registration requirements of the Securities Act.

        The percentage of notes outstanding beneficially owned by each selling securityholder is based on $125,000,000 aggregate principal amount of notes outstanding. The number of shares of common stock owned prior to the offering includes shares of common stock issuable upon conversion of the notes. The percentage of common stock outstanding beneficially owned by each selling securityholder is based on 144,455,283 shares of common stock outstanding on December 31, 2004. The number of shares of common stock issuable upon conversion of the notes offered for resale hereby is based on a conversion rate of 66.6667 shares of common stock per $1,000 principal amount of the notes and a cash payment in lieu of any fractional share. The conversion rate, and therefore the number of shares of common stock issuable upon conversion of the notes, is subject to adjustment in certain circumstances. Accordingly, the number of shares of common stock issuable upon conversion of the notes may increase or decrease.

        The prospectus is hereby supplemented as follows to restate, in its entirety, the table of selling securityholders under the caption “Selling Securityholders” contained on pages 41-42 of the prospectus:


 
 
 
Name

Principal Amount of
Notes Beneficially
Owned and Offered
for Resale Hereby (1)

Percentage of
Notes
Outstanding

Shares of
Common Stock
Owned Prior to the
Offering (1)(2)

Percentage
of Common Stock
Outstanding(3)

Shares Issuable Upon
Conversion of the
Notes and
Available
for Resale (4)

Advent Convertible Master, L.P. $ 6,203,000   4.96 % 413,533   *   413,533  
Alpha U.S. Sub Fund 4 LLC $ 200,000   *   13,333   *   13,333  
The Animi Master Fund, Ltd. $ 5,000,000   4.00 % 333,333   *   333,333  
Arbitek Master Fund L.P. $ 5,000,000   4.00 % 333,333   *   333,333  
BNP Paribas Equity Strategies, SNC $ 1,161,000   *   100,368   *   77,400  
BTOP Multi Strategy Master Portfolio $ 3,000,000   *   200,000   *   200,000  
Citigroup Global Markets Inc. (5) $ 6,250,000   5.00 % 416,666   *   416,666  
Clinton Multistrategy Master Fund, Ltd. $ 3,887,000   *   259,133   *   259,133  
Clinton Riverside Convertible Portfolio Limited $ 1,635,400   *   109,026   *   109,026  
Context Convertible Arbitrage Fund, L.P. $ 350,000   *   23,333   *   23,333  
Context Convertible Arbitrage Offshore, Ltd. $ 1,050,000   *   70,000   *   70,000  
Convertible Securities Fund $ 25,000   *   1,666   *   1,666  
CooperNeff Convertible Strategies (Cayman)
   Master Fund, LP
$ 1,122,000   *   74,800   *   74,800  
CSS, LLC $ 2,000,000   *   133,333   *   133,333  
The Drake Offshore Master Fund, Ltd. $ 19,000,000   15.20 % 1,266,667   *   1,266,667  
Deutsche Bank Securities Inc. $ 500,000   *   33,333   *   33,333  
Excelsior Master Fund L.P. $ 500,000   *   33,333   *   33,333  
FrontPoint Convertible Arbitrage Fund $ 750,000   *   50,000   *   50,000  
Geode U.S. Convertible Arbitrage Fund, a series of
  Geode Investors LLC
$ 3,000,000   2.40 % 200,000   *   200,000  
GLG Market Neutral Fund $ 5,000,000   4.00 % 333,333   *   333,333  
Grace Convertible Arbitrage Fund, Ltd. $ 6,000,000   4.80 % 400,000   *   400,000  
HFR Arbitrage Fund $ 397,000   *   26,466   *   26,466  
Highbridge International LLC $ 5,000,000   4.00 % 333,333   *   333,333  
Institutional Benchmark Management Fund
  c/o Quattro Fund
$ 200,000   0.16 % 13,333   *   13,333  
KBC Financial Products USA, Inc. $ 5,250,000   4.20 % 350,000   *   350,000  
Laurel Ridge Capital, L.P. $ 10,500,000   8.40 % 700,000   *   700,000  
LDG Limited $ 85,000   *   5,666   *   5,666  
Lexington Vantage Fund c/o TQA Investors, LLC $ 7,000   *   466   *   466  
Lionhart Aurora Fund Ltd. $ 300,000   *   20,000   *   20,000  
Lionhart Global Appreciation Fund Ltd. $ 1,550,000   1.24 % 103,333   *   103,333  
Lionhart Titan Fund Ltd. $ 150,000   *   10,000   *   10,000  
Lyxor $ 741,000   *   49,400   *   49,400  
Lyxor/Context Fund Ltd. $ 200,000   *   13,333   *   13,333  
Lyxor/Convertible Arbitrage Fund Limited $ 216,000   *   14,400   *   14,400  
Mohican VCA Master Fund $ 825,000   *   55,000   *   55,000  
MSS Convertible Arbitrage I c/o TQA Investors, LLC $ 4,000   *   266   *   266  
National Bank of Canada $ 125,000   *   8,333   *   8,333  
Nations Convertible Securities Fund $ 5,975,000   4.78 % 398,333   *   398,333  
Partners Group Alternative Strategies
  PCC Limited - Green Delta Cell
$ 1,505,000   1.20 % 100,333   *   100,333  
Quattro Fund Ltd. $ 4,500,000   3.60 % 300,000   *   300,000  
Quattro Multistrategy Masterfund LP $ 300,000   0.24 % 20,000   *   20,000  
Radcliffe SPC, Ltd for and on behalf of the Class A
  Convertible Crossover Segregated Portfolio
$ 7,000,000   5.60 % 466,666   *   466,666  
Ritchie Convertible Arbitrage Trading $ 675,000   *   45,000   *   45,000  
Royal Bank of Canada (Norshield) $ 175,000   *   11,666   *   11,666  
Silverback Master, LTD $ 1,000,000   *   66,666   *   66,666  
Singlehedge US Convertible Arbitrage Fund $ 264,000   *   17,600   *   17,600  
Sphinx Convertible Arbitrage $ 2,581,000   *   172,066   *   172,066  
Sphinx Fund c/o TQA Investors, LLC $ 93,000   *   6,200   *   6,200  
Sturgeon Limited $ 237,000   *   15,800   *   15,800  
TQA Master Fund Ltd. $ 709,000   *   47,266   *   47,266  
TQA Master Plus Fund Ltd. $ 1,246,000   1.00 % 83,066   *   83,066  
UBS AG London PB HFS $ 2,000,000   1.60 % 133,333   *   133,333  
Univest Convertible Arbitrage Fund II Ltd. (Norshield) $ 100,000   *   6,666   *   6,666  
XAVEX Convertible Arbitrage 7 Fund
   c/o TQA Investors, LLC
$      90,000   *   6,000   *   6,000  
Zurich Institutional Benchmarks Master Fund Ltd.
   c/o TQA Investors, LLC
$ 135,000   *   9,000   *   9,000  

  * Less than one percent of the notes or common stock outstanding, as applicable.

  (1) Total principal amount of notes and shares of common stock issuable upon conversion of notes listed in this table and in the table in the prospectus under the heading “Selling securityholders” is more than $125,000,000 and 8,333,337 shares, respectively, because certain of the selling securityholders may have sold, transferred or otherwise disposed of all or a portion of their notes in transactions exempt from the registration requirements of the Securities Act since the date on which they provided the information regarding their notes for inclusion in this table and the table in the prospectus. The maximum principal amount of notes and shares of common stock issuable upon conversion of the notes that may be sold under this prospectus supplement and the accompanying prospectus will not exceed $125,000,000 and 8,333,337 shares, respectively.

  (2) Includes shares of common stock issuable upon conversion of the notes, assuming a conversion rate of 66.6667 shares per $1,000 principal amount of notes and a cash payment in lieu of any fractional share interest. The conversion rate is subject to adjustment as described under “Description of Notes—Conversion of Notes.”

  (3) Calculated based on Rule 13d-3(d)(i) under the Securities Exchange Act of 1934 using 143,253,755 shares of common stock outstanding on August 19, 2004. In calculating this amount, we treated as outstanding the number of shares of common stock issuable upon conversion of all of that particular holder’s notes. However, we did not assume the conversion of any other holder’s notes.

  (4) Consists of shares of common stock issuable upon conversion of the notes, assuming a conversion rate of 66.6667 shares per $1,000 principal amount of notes and a cash payment in lieu of any fractional share interest. The conversion price is subject to adjustment as described under “Description of Notes—Conversion of Notes.”

  (5) Citigroup Global Markets Inc. is a broker-dealer and was an initial purchaser of the notes that received customary compensation for such services.

        Information concerning other selling securityholders will be set forth in additional prospectus supplements or post-effective amendments from time to time, if required. Information concerning the securityholders may change from time to time and any changed information will be set forth in prospectus supplements or post-effective amendments if and when necessary. In addition, the conversion price, and therefore, the number of shares of common stock issuable upon conversion of the notes, is subject to adjustment under certain circumstances. Accordingly, the number of shares of common stock into which the notes are convertible may increase or decrease.

        The prospectus dated June 21, 2004, together with the prospectus supplements dated July 20, 2004, August 5, 2004, August 20, 2004, September 8, 2004, October 5, 2004, November 18, 2004, January 31, 2005 and this prospectus supplement, constitutes the prospectus required to be delivered by Section 5(b) of the Securities Act of 1933, as amended, with respect to offers and sales of the notes and the shares of our common stock issuable upon conversion of the notes. All references in the prospectus to “this prospectus” are hereby amended to read “this prospectus (as supplemented and amended).”

        Investing in the notes or shares of our common stock involves risk. See “Risk Factors” beginning on page 6 of the prospectus.

        Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus supplement or the accompanying prospectus. Any representation to the contrary is a criminal offense.