MissionX is a free open source multiplatform multilanguage 2d arcade shooting game. The game takes place in space where you take control of captain Mark's starship in his mission to defend earth from the macronian invasion. Supported operating systems are Windows XP (both x86 and x64), Windows Vista (both x86 and x64), Windows 7 (both x86 and x64) and Linux (x86). Mac OS X support is still experimental and has not been tested. Available languages are Italian and English. The game is completely written in java (but you won't have to install the JRE) and is based on the EasyWay Game Engine v4.5, a free open source 2D game engine.