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