Here is the full list of all 27 Super Sanctum TD achievements.
Unlock all towers and skills.
Clear the Hydro Islands.
Get 100 perfect rounds.
Kill a Big Walker.
Unlock all tower and skill slots.
Kill 10 enemies with a single shot
Hit 10 enemies with Thunderbolt.
Beat a level on Hard.
Clear the Facility Compound
Clear the Training Area.
Complete one level.
Kill 2 enemies with a single Bomb.
Beat a wave with only skills and blocks.
Complete a level without using any skills.
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.
Kill the Charger and all its clones.
Beat all levels on Hard.
Kill the golden Walker.
Get all stars in all levels on Hard difficulty.
Kill 10.000 Walkers.
Clear Elysion