We are mainly using the follow games/expansions in our racing clubs and leagues. This thread is to help you purchasing the games if you miss any. RACE 07 (the base game) 4,99 Euro (!!) http://store.steampowered.com/app/8600/ GTR Evolution 15 Euro http://store.steampowered.com/app/8660/ GT Powerpack 4,99 Euro http://store.steampowered.com/app/44650/ STCC - The Game 2 9,99 Euro http://store.steampowered.com/app/44620/?snr=1_5_9__13 Retro Pack 4,99 Euro http://store.steampowered.com/app/44660/?snr=1_5_9__13 If you own the full RACE 07 game you can buy the other games as "expansion packs" they are significantly cheaper on Steam as you don't need to purchase RACE 07 anymore. Have you bought on of the games above as a full game it will include the race 07 game as well and you can purchase the others as expansions. If you have bought all the games above joining any RD racing club events or leagues is easy You don't need to buy the overpriced RACE Injection pack as that does NOT include all the cool GT content from GTR Evolution as you can see. For 40 euros in total you have all you need.