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