Here is the full list of all 23 Hero Survival achievements.
Get level 10
Get level 20
Get level 30
Get level 40
Slay 100 enemies
Slay 250 enemies
Slay 500 enemies
Slay 1000 enemies
Slay 2500 enemies
Slay 5000 enemies
Slay 10000 enemies
Slay 20000 enemies
Unlock John
Unlock Abe
Unlock Ford
Unlock Torquemada
Unlock Stoker
Unlock all characters
Unlock all weapons
Beat the devil at 1 arena
Beat the devil at 2 arena
Beat the devil at 3 arena
Beat the devil at 4 arena