Tetris
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Parent game
Vs. Tetris is a game developed by Tengen for the Nintendo Vs. Unisystem arcade platform. The game would be the basis for Tetris (NES, Tengen) released some time later, and is noticeably less developed (e.g. the piece graphics use only solid colored or striped blocks).
Could be interesting
Super Tetris is an unlicensed version of Tetris, released for the Sega Master System in South Korea.
A fantastic new word game, with over 7,500 puzzles. Don't worry about getting stuck, with a built-in dictionary players can look up definitions while playing. Challenge your vocabulary prowess and play until you win!
Turn It On! is a collection of black boxes, where your task is to guess the mechanics behind. According to the played setting, you will use buttons, switches, wheels, knobs, handles, cogs, a handful of meters, displays, etc. You will need to recognize the machine's behavior and time your action wisely.
Unlicensed Master System port of the MSX version of Quarth (Block Hole).
Angry Birds is a port of the famous Android/iOS/Web game Angry Birds for the Sega Genesis. It was originally developed in China by a huge fan of the Angry Birds game and the original ROM is available to download for free. As a result, pirates have put it on cartridge form and sold it to the public. There is also another version on the Famicom (mostly Famiclones). The game is largely incomplete and contains a bug which makes the game crash after pressing the Reset button.
Block Force is a port of Quarth originally developed by Konami. It was made by Hwang Jiun-Ming, a relative of Hwang Shinwei and released in 1990. The game was often included in multicarts released by RCM Group between 1990 and 1991.
