Here is the full list of all 16 Krimzon hoard achievements.
Kill 100 Enemies
Kill 500 Enemies
Kill 1000 Enemies
Kill 100 Spiders
Kill 100 Mechs
Kill 100 Mutants
Reach wave 10 in challenge mode
Reach wave 20 in challenge mode
Reach wave 30 in challenge mode
Reach wave 40 in challenge mode
Reach wave 50 in challenge mode
Reach wave 10 in all challenge levels
Collect all guns
Max out crystal perks
Reach wave 20 without opening a chest
Complete campaign