Sanctum achievements

22.78%

Fully Covered

Build one of each Tower on Arc.

23.97%

I Never Miss

Hit 15 enemy weak spots in a row with the Sniper Rifle.

24.95%

(See?) I've got this

Kill an entire wave without aid of towers on Normal or higher difficulty.

26.14%

Stacked

Upgrade all 3 weapons to level 6.

26.90%

Bridge Troll

Survive all the waves on Bridge.

27.01%

...You get a Different Machine

Upgrade Towers 500 times.

29.28%

BOOM! HEADSHOT!

Kill 4 enemies by hitting their weakspot with one Sniper Rifle clip.

30.04%

Et Tu Brute

Shoot a teammate into an enemy.

31.34%

You shall not PASS!

Build 50 Block Towers during one Build Phase.

32.43%

Giant Enemy Crab

Get 5000 weak spot hits.

33.08%

Festivus for the rest of us

Collect 10 presents.

40.46%

If you Replace the Working Parts...

Upgrade Towers 250 times.