Here is the full list of all 32 Moss Destruction achievements.
You killed an enemy 16 meters off-screen. They might have had children!
Killed the desert boss
You got killed by a Tentacle. A Tentacle, Dude. Really?
You got killed by a Bomb Bot, that's what happened.
Killed your first Camo Bug
Killed 5 enemies at once
Killed 2 enemies with the same melee attack
Killed 3 enemies with the same melee attack
Stacked two PushDaTempo Alien Techs
Died next to a medkit
Killed an enemy with an incoming projectile bouncing off the roto node
Killed an enemy with a grenade after 2 bounces
Unlocked all mechs
Picked up 500 worth of Krysol throughout the game
Kill 1000 enemies
Kill 10000 enemies
Died 10 times
Lingered on the same desert level for 2 minutes after sunset
Completed a level with 100% accuracy
Passed a level using only melee attacks (level 2 and up)
Killed 100 enemies with the sniper rifle
Killed 50 enemies while in Saw Frenzy
Finish a run with the Tgun being the most favoured weapon
Completed the Dreary Desert world 15 times
Finished the current level within 3 seconds after the effect of the Last Stand mech tech was triggered
Killed 3 enemies with one sniper bullet
Killed the Severe Serpent
Plucked the Scar-Crow and completed the game
Killed yourself with the Cleaver
Finish a complete run without installing any active or passive cartridges