Here is the full list of all 22 Dead Exit achievements.
Win Easy Solitaire
Win Very Easy Solitaire
Scrap a total of 1000 dead
Win Medium Solitaire
Win Hard Solitaire
Win Very Hard Solitaire.
Win Insane Solitaire
Win Impossible Solitaire
Beat Solitaire with 3 bases and 3 sets and extra dead in under 100 actions
Beat Solitaire with 3 bases and 3 sets with no resources, vehicles, or survivors in the scrap.
Win an online game with at least 4 opponents
Win an online game where you are the only player to survive
Win an online game having sacrificed 5 or more survivors
Win an online game having killed 5 or more of other player's survivors
Have your base overrun in an online game, but come back to win
Finish an online game where both you and an adjacent player have 3 complete sets
All players survive in an 8 player online game with extra dead
Survive a game by acting on the last round
Complete any game with 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