Blockdown

Blockdown is a port of more modern versions of the smash game Tetris. It runs in the Semigraphics-12 mode, given the Coco 8 colors+black in an effective 64x96 color mode. Some of the more modern features are the "shadow" block that it shows on the bottom (showing where it will land, even when your piece is up near the top), a simultaneous 2 player mode, and a cool easter egg when you hit CLEAR-F on the text based intro screens: it toggles between the normal and an "alternate" character set (that looks more Russian, using a mixed text character scanline technique similar to an earlier Tetris game for the Dragon). It also includes multiple skill levels, top 8 scores and speed and garbage options to tune the gameplay. It was a simultaneous released for the Coco and the Dragon computers.