I spent a lot of good time playing Spitires: MudRunner and I regret nothing. It's slow pacing and punishing mud mechanics made it pretty enthralling to sit behind my XBONE controller and haul lumber in the Siberian wilderness. Not to mention that once that bit started feeling a little stale there was always map exploration and rock crawling to do with the many and varied vehicles. Modders have also added a ton of longevity to MudRunner by creating maps and vehicles galore. It's a good experience and I recommended it in my review here.
Saber has very recently added an inexpensive expansion that brings the challenge to the U.S. and I've been enjoying it a lot. Click that Read More button and I'll tell you how I'm getting east bound and down on PC. Read more