Here is the full list of all 36 Dead Exit achievements worth 1,000 gamerscore.
Win a Very Easy game of City Escape
Win an Easy game of City Escape
Win a Medium game of City Escape
Win a Hard game of City Escape
Win a Very Hard game of City Escape
Win an Insane game of City Escape
Win an Impossible game of City Escape
Scrap 1000 dead
Beat City Escape with 3 bases and 3 sets and extra dead in under 100 actions
Beat City Escape with 3 bases and 3 sets with no resources, vehicles, or survivors in the scrap.
Win an online game against at least 4 opponents.
Win an online game where you're the only player to survive.
Win an online game having sacrificed 5 or more survivors.
Win an online game having killed 5 or more survivors.
Have your base overrun in an online game, but come back to win.
Finnish an online game where both you and an adjacent player have 3 complete sets.
All players survive in an 4 player online game with extra dead.
Survive a game by acting in the last round.
Complete a game with all 8 vehicles in your stockpile.
Survive a total of 30 online games.
Have a survivor return from the scrap twice in one turn.
Have all slots at your base filled by survivors and vehicles.
Won Very Easy Survival
Won Easy Survival
Won Medium Survival
Won Hard Survival
Won Insane Survival
Won Impossible Survival
Win Impossible War
Win Insane War
Win Very Hard War
Win Hard War
Win Medium War
Win Easy War
Win Very Easy War