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