Sanctum is an unassuming game. It is clunky from the visual perspective and tutorialization. It isn't particularly satisfying or creative in its towers or weapons. There isn't a strong sense of style or music. But this game does scratch that 3D tower defense itch really well, criminally well for how underplayed it is (Less than 2% of players have beaten the final level despite it being quite satisfying). The maze building offers the most freedom in the genre I have seen, the experimentation and min-maxing is an option for players, and you get a hefty amount of money every level to keep your decision making involved.

If you want more Orcs Must Die, this game is fantastic. If you bounced off Orcs Must Die for the sappers and fantasy aesthetic, this is the game for you. Otherwise, this game is just gonna awkwardly stand behind Orcs Must Die.