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