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