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