Ones and zeros aren't scary on their own, but when they're combined into these ten video-game race tracks, watch out. These are the ten circuits our readers think are the most difficult video-game tracks out there.

Our real-life cars are great, but we can't usually use them to catch funky crooks or evil spies, and we can't race them in Formula One — or in 2560 or 1967. Luckily, there's video games! Here's our twenty favorites.