The GOG version has a known turn timer bug I wasn't aware of until well after the 30 day refund period, as I don't usually immediately play through newly purchased games. The bug is long fixed in the Steam version, which means the GOG version released with this known bug despite it being fixed years before. Details here: https://www.gog.com/forum/blood_bowl_series/blood_bowl_chaos_edition_bug_issues/page1
GRIP is the spiritual successor to the 1999 Sony Playstation future racer series Rollcage, in which you can race not only on the ground, but also on the walls and ceilings of courses while using the occasional powerup or weapon against the other racers. And while I never got around to playing Rollcage much way back then, I can say that GRIP is a solid racer. The game features 7 race types including standard races, deathmatch, Carkour: Which is a series of 21 special courses that seem to be checkpoint focused solo races, and others. Career mode features numerous tiers, each with their own set of tracks, rules, and restrictions that gradually increase the difficulty as you progress. Tracks are numerous and varied in environment. There are 32 regular tracks, 21 Carkour tracks, and 6 deathmatch arena tracks for a total of 59 tracks. Vehicles are also numerous and varied, and often have two versions: A standard wheeled version, and a no-wheeled antigravity version or Airblade version as the game calls it (In case you want that "WipEout" feel). Counting both versions, there are around 40 vehicles in the game, and these can be customized with numerous unlockable cosmetic parts. Opponent AI is fair and challenging, and put up a good fight on normal difficulty setting in my brief test. The game also features split-screen local multiplayer. Graphics and sound are great. The game runs very well, even on my aging Nvidia GTX 970, Intel Core i5 3570K, 8GB RAM setup. The devs obviously know what they're doing with Unreal Engine 4. The only downside is the GOG version doesn't have online multiplayer, VR, or the DeLorean dlc vehicles the Steam version has, but on the upside, all the other dlc that is sold separately in the Steam version is all included in the GOG version at no extra cost, which is a great deal if you're not concerned with the missing features from the Steam version. Overall, a solid racing game that makes me look forward to other games from this developer.