Downhill: A window camper/sniper paradise. Feels like Array, forget which game that was in right now but I never liked it. To be fair it isn't as bad as Array.
Grind: This years Stadium, but not nearly as fun. Still the best of the bunch. I like the sunny beach setting, a nice change from all the rubble towns.
Hydro: Absolutely awful. Feels like Meltdown with waterfalls. Terrible flow to it, no pun intended.
Mirage: Didn't get anything other than a game of Search & Destroy on it, but it seems forgettable enough.