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