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