Fortis is a game for MorphOS. The game has 36 levels in 3 stages. The game increases in difficulty when you get to higher levels. It has great sound effect, a weapons store, changeable back-grounds, diversity of enemies, pick-ups in the bonus levels, three language interface and much more. New in this version: Better management of CPU usage. USB joystick / joypad support. Compiled with MorphOS SDK 2.0.