This is THE most favorite and played game of all time in my entire gaming history.
I started playing this game on XBox One, got every achievements, completed every maps with only 1 star (using the cheapest, usually least-capable vehicles), and had a great time. Knowing it was also on PC, and that it supported mods, I bought a second copy on Steam, and oh boy, I was hooked. Did everything I did on the XBox copy once again, earned all achievements, and then hopped straight to the Workshop and started looking for mods. 7+ years and counting, probably until I can't do anything anymore, will then I stop playing this game.
Despite that it's a "successor" to SpinTires, and the circumstances for its creation wasn't the best one, it's still a worthy alternative to the aforementioned title, and certainly superior to SnowRunner. This game is better than SpinTires mostly in the QoL improvements and minor details. Physics aren't as good as SpinTires, but once again, still much better than anything comes after it. Overall, the 2 are similar enough that their contents can be transfered relatively straightforward.
Just like its predecessor, gameplay is very simple, but due to the way the game is designed, it's infinitely replayable, especially once mods are taken into account. I run an extremely-heavily-modded iteration of MudRunner, so much that it's more like a "rework" of the game. Nearly everything was looked at, and changed if necessary, and there are a lot of it. Of about ~2000+ hours playtime on Steam alone, anywhere between 80-90% of that is just for modding and learning about the workings of the game, so I can mod the game better. About the only other game I spent modding that much is Battlefield 2. There's also Subnautica, but this one doesn't even come close in regard to the depths and scale of the 2 mentioned games.
Having this available DRM-free is one of my most yearned-for wishes. This is a game I'd absolutely do anything appropriate possible to see that happen.