The Protector Trials is the third DLC for BioShock 2 and the first to expand the singleplayer mode. Players step into the role of a Big Daddy who must fight off splicers while his Little Sister harvests ADAM from corpses. It offers six new maps with three difficulty levels, new unlockables and seven new achievements/trophies. There are three new weapons and Plasmid load-outs plus a fourth bonus load-out received when all previous ones are completed.