Dungeon Of The Endless may only be in early access, but Amplitude Studios' genre hybrid already looks beautiful and plays beautifully.
Halfway between a roguelike and a dungeon defence game, you'll lead a team of heroes though procedurally-generated levels, exploring and gradually uncovering unpredictable environments full of traps and deadly creatures. However, you'll also have to defend a crystal to stay alive: a power generator that lets you transform the dungeon into a powerful fortification bristling with turrets and defences. Constantly changing pace and hitting you where you least expect, this is very much more than the sum of its already-impressive RPG, roguelike, strategy and defensive parts; including elements we'd only traditionally expect from 4X games. Well, they did develop Endless Space after all.
Not to put too fine a point on things, but Dungeon of The Endless also looks drop-dead gorgeous despite being v.0.1.3.
You don't have to take my word for it, since I've recorded some video impressions for your eager delectation. This is very much a first contact video recorded in effectively one take (including live voiceover), so more detailed intel will follow soon!