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