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