EXHIBIT 10.4 Scientific Games International, Inc. November 1, 2004 John Bentley President Electronic Game Card, Inc. 29th Floor, 1251 Avenue of The Americas New York, New York 10020 Re: Joint Venture Agreement, Subscription Agreement and Registration...

EXHIBIT 10.4

Scientific Games International, Inc.

November 1, 2004

Xxxx Xxxxxxx
President
Electronic Game Card, Inc.
29th Floor, 0000 Xxxxxx xx Xxx Xxxxxxxx
Xxx Xxxx, Xxx Xxxx 00000

Re: Joint Venture Agreement, Subscription Agreement and Registration Rights
    Agreement

Dear Xxxx:

This letter confirms that the referenced documents are amended to reflect the
revised number of shares (2,171,594) being purchased under the Subscription
Rights Agreement in consideration of the revised payment of $1,085,797.

Please acknowledge your agreement and consent in the space provided below.

Thank you for your kind help in this matter.

Very truly yours,

/s/ C. Xxxx Xxxxxx, Xx.
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C. Xxxx Xxxxxx, Xx.
Vice President and General Counsel

Acknowledged and agreed as of the 2nd day of November 2004.

ELECTRONIC GAME CARD, INC.

By: /s/ Xxxx Xxxxxxx
    -----------------------
    Xxxx Xxxxxxx, President