So I'm sure alot of you are thinking "why request such a game that anyone can play anyway without a pc?" The reason is this version had 3 games modes that haven't been seen since: Pyramid Yahtzee, Painted Yahtzee, and Battle Yahtzee. Pyramid used d4's (four sided dice) and had some slightly different patters, rather than short and long straight. Painted Yahtzee had dice with both numbers and colors on them, so along with the standard matches, you also had flushes, full houses of colors, and more like that. Battle Yahtzee was a 2 player versus, where the first played would make his three rolls, then the second would roll his first two. With the third roll, the first player's dice were returned to the rolling field, where the second player could try to ruin his roll. Then each player decided how to play their rolls, and the order of players switched. It was brutal.
For those who need image references, and a reliable release date, gamefaqs has some info:
http://www.gamefaqs.com/pc/29900-ultimate-yahtzee
Hasbro Interactive from 1996, tiny mom & pop online shops have it, along with ebay. Should be safe for the site.