The humble ZX81 has a new version of Tetris thanks to Spanish coder, Salvacam.

81-tris features a normal mode and an arcade mode and you can also redefine the keys. With arcade mode you are given some pre-fallen blocks to get rid of – after ten lines you get a new variation.

81-tris.png

You need a 16K RAM expansion if you're playing on real hardware, and you can download the game from Salvacam's website.