Sea of Thieves been done but since they've had Achievements disabled since Dec. 8th - Who knows when it'll actually happen.
Wow! Rare completion. Congrats!
This and Minecraft Dungeons gotta chill.
At least you dont have to pay for this, unlike Minecraft.
Use a penetration weapon to kill 500 enemies through cover, while in DART Overlay - Syndicate
100% completion (level, research and challenges) - Syndicate
Breach 873 grenades - Syndicate