OpenFodder

Cannon Fodder is an action-strategy shoot 'em up game developed by Sensible
Software and published by Virgin Interactive.

The game is military-themed and based on shooting action but with a strategy
game-style control system. The player directs troops through numerous missions,
battling enemy infantry, vehicles and installations.

Open Fodder is an open source version of the Cannon Fodder engine, for modern
operating systems.