Here is the full list of all 27 Super Sanctum TD achievements.
Kill a Walker with an Anti Air Tower.
Unlock all towers and skills.
Clear the Hydro Islands.
Have no blocks at the end of a level.
Beat a wave with only skills and blocks.
Beat a level on Hard.
Complete a level without using any skills.
Unlock all tower and skill slots.
Kill a Big Walker.
Kill the golden Walker.
Clear the Facility Compound
Get 100 perfect rounds.
Hit 10 enemies with Thunderbolt.
Kill 10 enemies with a single shot
Clear the Training Area.
Complete one level.
Kill 2 enemies with a single Bomb.
Kill 10 enemies in a single Penentrator shot.
Clear Brightholme Industries.
Kill a Huge Walker.
Beat all levels on Normal.
Kill the Patriarch.
Kill the Charger and all its clones.
Beat all levels on Hard.
Get all stars in all levels on Hard difficulty.
Kill 10.000 Walkers.
Clear Elysion