It's not just indoor game, there're enough levels "outside" too. It uses real physics too, just that the cars are not the real heavy street cars but toy RC's which has been taken into account. Each car also has it's lighter or heavier weight, so don't say it doesn't use real physics. Actually this game makes more fun than many of those "professional racing games with real physics" out there because it's about game fun and not about the reality, at least that's my opinion.
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