Finish one match of Gotham City Impostors.
Complete the Initiation mission.
Kill 50 enemy players using the panic-slap melee attack.
Turn the tables in Fumigation when the enemy team's victory is imminent.
Win each game mode in Ace Chemical, Amusement Mile, Crime Alley, Gotham Power and The Docks.
Accept your first Promotion.
Complete all feats related to a particular gadget or support item.
Earn 50 gold medals in Challenge mode.
Earn a 10-kill streak.
Become a Nemesis 50 times.
Unlock any locked loadout or costume item.
Complete all feats related to a particular weapon.