Full list of all 84 A Robot Named Fight! achievements.
The base game contains 78 achievements, and there is 1 DLC pack containing 6 achievements.
Defeat the Megabeast six times
Have Fire Bolts with an attack delay less than 0.2
Defeat Corrupted Miner
Defeat the Megabeast five times
Have Explosive Bolts that Deal 8 or more Damage
Defeat the Megabeast four times
Defeat Moleman Shaman
Defeat Stalkus
Possess 3 of Each Archaic Scrap
Defeat Leviathan
Defeat the Megabeast Core
Discover The Beast's Guts
Defeat the Megabeast thrice
Defeat Skin Deviler
Defeat the Megabeast twice
Possess 81 Nanobots
Have 18 or more nanobots at once
Defeat the Megabeast once
Have a max speed of 17 or higher
Defeat Polyphemus
Donate 729 gray scrap to shrines
Possess 99 Scrap
Fire a shot size of 4 or greater
Defeat Ooze Hart
Discover the Crystal Mines
Donate 512 gray scrap to shrines
Discover the Coolant Sewers
Kill 20 Champions
Discover Every Teleporter in a Run
Defeat all Cave bosses
Defeat all Factory bosses
Collect 4 orbs in a single run
Collect 100% of the items in a run
Have max health of 20 or higher
Defeat White Wyrm
Defeat Flesh Adder
Collect 4 energy weapons in a single run
Defeat Blightbark
Donate 343 gray scrap to shrines
Defeat Cephalodiptera
Donate 216 gray scrap to shrines
Defeat Mouth Meat
Defeat all Surface City bosses
Defeat Metal Patriarch
Have a shot speed of 22 or higher
Discover The Buried City
Donate 125 gray scrap to shrines
Defeat Mouth Meat Senior
Donate 27 gray scrap to shrines
Defeat Abomination
Defeat Sluggard
Discover The Factory
Defeat Wall Creep
Die
Discover The Caves
Defeat Beak Lord
Defeat the Megabeast in under 35 minutes
Defeat the Megabeast Core in under 50 minutes and collect 100% of the items in a single run
Complete the game with a collection rate less than 15%
Complete Boss Rush
Complete Exterminator
Complete Mega Map
Defeat 14 Different Bosses
Kill 15k enemies
Discover Every Area