Tactic is a video game, originally released for the Acorn Archimedes in 1990 by Eterna.
Tactic is a falling block puzzle as popularised by the game Tetris.
The patterns required to complete the level are shown at the bottom of the screen.
[1] It was then converted to BBC Micro and Acorn Electron by Superior Software.
[2] The game was then released by Nessprod for iPhone and iPod Touch in 2009.