Space Invaders is a tiny portable clone of the classic arcade game.
The program arrives as a single executable, no installation required - just unzip and run it on the nearest PC.
The game looks and feels much like the original: pixelated graphics and annoying audio, yet still entertaining, as you try to eliminate the alien hordes before they reach ground level.
Controls are simple. Press 5 to enter coins, then start either a 1 or 2 player game (2 players means one after the other, not simultaneously). The left and right arrow keys move your cannon, and left Ctrl is the "fire" key.
The big omission is the lack of a "Pause" key. You can sort-of simulate this by clicking one of the menus, but if you switch to any other application, the game resumes again.
Space Invaders' tiny size and portability is a plus, but it desperately needs a Pause key.