Here is the full list of all 28 Mech Rage achievements.
Collect all upgrades.
Upgrade speed to level 4.
Upgrade ammo capacity to level 5.
Upgrade armor to level 5.
Upgrade shield to level 4.
Kill 10 Hive Mother aliens.
Kill 300 Rascal aliens.
Destroy 300 barrels.
Destroy 500 crates.
Die in tutorial.
You've been naughty and used cheats.
Get rid of the evidence.
Win game on hard difficulty.
Destroy Alien Gateway.
Kill 240 Grunt aliens.
Win Command Deck level.
Upgrade dash to level 4.
Win Main Deck level and destroy Scorpion Boss.
Win Hub level and destroy Sentinel boss.
Kill 1000 enemies.
Give Mysterious Contraption a go.
Win Engineering Deck II level.
Kill 500 Kamikaze aliens.
Win Engineering Deck I level.
Win Storage Deck II level.
Find upgrade hidden in weird place…
Win Storage Deck I level.
Win Hangars level.