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