The LithTech Engine was initially developed by Monolith in collaboration with Microsoft, until LithTeh Inc was formed to continue development on the engine. LithTech has been used to create a number of games, establishing itself as a viable alternative to other engines for FPS creation. The current iteration is codenamed 'Jupiter Extended' or 'Jupiter Ex'
For older versions of the Master Server Patch. It adds Aizin, Dropzone, Predator and Uvajed. The maps from Primal Hunt are playable in plain AvP2.