Here is the full list of all 29 Axiom Verge achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete the entire game in under 4 hours.
Complete the game without dying more than once.
Complete the game once in Speedrun Mode.
Complete the game with under 40% of all items.
Acquire 100% of all weapons, tools, upgrades, and notes.
Uncover 100% of the game map.
Find 100% of all notes in the game.
Find 100% of all Power Nodes.
Glitch every enemy type at least once.
Bypass Athetos' aborted clone wihout damaging it.
Spare the Xedur Hul variant.
Find 100% of Health Nodes.
Complete the game in Hard difficulty.
Defeat Athetos.
Find 100% of the weapons in the game.
Defeat Sentinel.
Destroy 2000 regenerating blocks.
Destroy 2000 bricks.
Use the Passcode Tool for the first time.
Find 100% of the tools/abilities in the game.
Defeat the Ukhu Variant.
Defeat one of Athetos' aborted clones.
Be defeated by yourself.
Defeat the Gir-Tab variant.
Discover your first secret world.
Defeat the Uruku variant.
Glitch your first enemy.
Defeat the Telal variant.
Defeat the Xedur variant.