ASKE Demo Playthrough (Realms Deep 2021)
4ASKE caught my eye as seeming particularly Quake-esque - even moreso than Dread Templar which I had tried out during Nextfest (which was again playable during Realms Deep as well).
This definitely seems to scratch the Quake-like itch at a basic level. However, I find the difficulty implementation underwhelming - strictly damage scaling, no difference in enemy placement; the hardest difficulty seems to have 10x the damage of the easiest, and 2x the damage of the second-hardest. IMO it'd be a lot more interesting/replayable with actual variation in enemy arrangement between difficulties; I don't know if that's something they plan to add later.
I also felt like with the exception of the miniboss at the end of the demo, none of the encounters seemed particularly overwhelming (with the possible exception of the enemies that explode on contact which deal tons of damage on higher difficulties), but I have to keep in mind this is just the first 3 levels, so there's likely to be far more types of enemies to mix it up in the full game.
Despite the demo's shortcomings, this still makes it onto the lower half of my list of a dozen or so games to keep an eye out for out of Realms Deep 2021.