Gamers of Germany Forum Post

You can get a DLC for this game for free on Steam:
https://store.steampowered.com/app/221169/GRID_2__Demolition_Derby_Pack

If you don't have an account:

Game: D8XBL-B79HB-7G5QB
DLC 1: BFD5F-TI66I-HE90V
DLC 2: B5VNM-YXJZA-VGRVA