Gotham City Impostors Achievements Full list of all 12 Gotham City Impostors achievements worth 200 gamerscore. It takes around 40-50 hours to unlock all of the achievements on Xbox 360.Filter Achievement View View Image viewList view Sort by TrueAchievement desc TrueAchievement asc Achievement name desc Achievement name asc GamerScore desc GamerScore asc TA Ratio desc TA Ratio asc Gamers desc Gamers asc Xbox.com order Date won desc Date won asc Flag Filter All None 12 Online Mode 2 Single Player 2 Cumulative + 1 Time Consuming 1 Buggy - 2 Level 10 Versus 12 External Content 1 Time/Date 9 x6 Players Required Link flagsOR joinAND join Achievements without these flags What are achievement flags? Click to find outApply Slap HappyKill 50 enemy players using the panic-slap melee attack. 3 guidesPrestigiousAccept your first Promotion. 5 guidesGearheadComplete all feats related to a particular gadget or support item. 4 guidesKill CrazyEarn a 10-kill streak. 7 guidesThanks for Playing!Finish one match of Gotham City Impostors. 1 guideCustomizerUnlock any locked loadout or costume item. 2 guidesWeapon SpecialistComplete all feats related to a particular loadout weapon. 4 guidesHero of the HourTurn the tables in Fumigation when the enemy team's victory is imminent. 2 guidesTotal VictoryWin each game mode in Ace Chemical, Amusement Mile, Crime Alley, Gotham Power and The Docks. 2 guidesInitiatedComplete the Initiation mission. 4 guidesShower of GoldEarn 50 gold medals in Challenge mode. 2 guidesNemesaurusBecome a Nemesis 50 times. 4 guides