The debate over Mass Effect 3's controversial ending rages on as does the game play. Mass Effect: Infiltrator is an offshoot of the popular game. Play as a rogue Cerberus agent, fighting against his former employer and their illicit experiments. You must run and gun through the massive Cerberus army, reach the Alliance and hand over the secret research info to put Cerberus out of commission. Any intel you grab along the way counts to your ME3 Galaxy At War Galactic Readiness Rating.