Research and Development is a puzzle-centric mod for Half-Life 2: Episode Two featuring an unarmed player but plenty of violent mayhem.
At the beginning this was a really great mod.. however, from the exact momeny in which you had to naviagate that bloody battery thru the maze, all came hell and it became simply frustrating to complete.. I used noclip with the battery and didn't bother trying to killt he bloddy strider. As a result, you lost 4 and got 6/10.