Here is the full list of all 31 Cavern Crumblers achievements.
Win a Reverse Tag game against 3 medium level AI Bots
Win a Reverse Tag game against 3 hard level AI Bots
Win a Tag game against 3 medium level AI Bots
Win a Tag game against 3 hard level AI Bots
Win a Last Man Standing game against 3 medium level AI Bots
Win a Last Man Standing game against 3 hard level AI Bots
Win a CTF game against 3 easy level AI Bots
Win a CTF game against 3 medium level AI Bots
Win a CTF game against 3 hard level AI Bots
Win a Deathmatch game against 3 medium level AI Bots
Win a Deathmatch game against 3 hard level AI Bots
Win a Deathmatch game against 3 easy level AI Bots
Win a Reverse Tag game against 3 easy level AI Bots
Win a Tag game against 3 easy level AI Bots
Win a Last Man Standing game against 3 easy level AI Bots
Create a Game
Finish 20 Games
Finish 50 Games
Finish 100 Games
Crumble 5000 Tiles
Crumble 10000 Tiles
Crumble 20000 Tiles
Shoot 5000 Bullets
Shoot 10000 Bullets
Shoot 20000 Bullets
Cover 1 Million Distance
Cover 2 Million Distance
Cover 4 Million Distance
Get 200 Kills
Get 500 Kills
Get 1000 Kills