Metal Arms: Glitch in the System.
The game was great. It was a third person shooter with a unique mechanic where you could assume control of, and play as, enemies. You also had a conversion grenade that would, well, convert enemy AI to your side for as long as you could keep them alive.
The weapons and upgrade system was perfect, with the game giving you just enough in game currency to always get something new, as you slowly maxed out all your weapons.
The multi-player had bots scattered all around the maps that you could take over and use to hunt each-other down. It was a solid game that, well, nobody played.