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