Research and Development is a puzzle-centric mod for Half-Life 2: Episode Two featuring an unarmed player but plenty of violent mayhem.
Im struggling against some bugs, i cant do some stuff like numpads (glow mesh missing sth...) but the idea behind the game is awesome and so are the puzzles, its a total ten because the bugs arent you're fault and if the game was on steam i wouldnt probably be having this trouble.