Klax (USA) (Unl) ROM

Klax is Atari's (under their Tengen label here) answer to Tetris. In particular it is what they produced when it was not clear if they would be able to legally release a Tetris cartridge again. Like most Tetris-style games, gameplay is somewhat addictive. Tiles progress down a treadmill towards a Breakout-style sliding carrier, which can hold 5 tiles and drop one at a time into a particular slot underneath. Each level lists an objective that must be met, such as a certain number of diagonal completions.
Klax is not necessarily as addictive as some competing Tetris-style games. The mini-game Blob Ball is very amusing and original, and is arguably the mini-game most deserving of a separate release.