I kind of cheated on that. Make a multiplayer game, private, max players 2, and the lowest number of bots (1 which means no bots in your game).
When you start, you will be alone on the track and can crash into all the walls and still finish 1st. I never would've gotten that one otherwise.That's really the most fun I'm getting out of this, finding fast ways to get those "challenge" achievements. The story and progression/grind related ones are really boring in comparison.
That's awesome, thanks

My theory is that GMG aim to cripple Steam's servers by forcing people to download gigantic games to earn a buck. They're going to rot Steam from the core.
I looked at some player stats for games when they got rewards, like Darksiders II, and there's barely even a spike at all. Seems like the actual number of people participating is still pretty small all things considered.