Swarmbreaker is an uncommonly mesmerising tower defence game in which enemies "cluster, collide and flow like a fluid"

Summary

It is said that King Canute once placed his throne on the shore and commanded the sea not to get his feet wet, thus proving to his flattering courtiers that only God Almighty holds sway over the elements. "But sire!" I would have told him, if I'd been one of the aforesaid lickspittles. "Why not lay down spike strips and park a couple of flamethrowers in the shallows?" I would have said this because I have just been playing Swarmbreaker , a tower defence game that aims to prove there is no fluid body so awe-inspiring that it cannot be machine-gunned into submission.

Description from Rock Paper Shotgun.