Tengen tetris publisher:Tengen programmer:Tengen release:1988 players:1 or 2 graphics:7 sound:8 play control:8 replay value:9 This is the well-known unlicensed version of Tetris from Tengen. What could be the real difference? Well, you have a 2 player mode, a vs computer mode, a with computer mode, more music, more levels, and each level is 30 lines instead of 10. This is indeed superior to the Nntendo release. This may be why nintendo really sued Tengen, cause they knew their version wasn't as good. This is a rare cart. I got lucky and found a copy for $15, which is less than most people want for it. There are only about 100,000 copies left after the Nintendo/Tengen lawsuit, which resulted in all copies being pulled. If you see a copy of this for cheap, buy it, even just to own it. How do you know if you see it? It has a black case with a tepered end, common of Tengen unlicensed carts, the label is orange, and the 'R' in Tetris is backwards. Happy hunting. final rating: definite buy