Below is a copy of my post on the Episode 1 + 2 forums back when Episode 1 first was released. I will come back and update this when I spend more time with Episode 2 and Duskworld.

REVIEW:
Just need to gush about this game. It's incredible. A pure joy to play.

I love the little touches. The movement and feel of Quake. The blood splatters of Shogo and Blood 2. The soldiers and real life level design of Half-Life. The interactivity of Duke 3D. The text interludes of Doom. The creepy, horror atmosphere of They Hunger. The rednecks of Redneck Rampage.

If you liked ANY of these games, you'll love Dusk. It distills everything awesome from 90s shooters into a single game.