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