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