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