I went ahead and made RTA the default timing for both Any% and 100%. That puts my run back at #1 for now, but the other runs were optimized for IGT instead of RTA, so my run should be quite easily beatable.

I agree that RTA is the best way to go for 100% runs. There's no easy way to choose RTA or IGT on a per-category basis, so I just removed the IGT times on the 100% leaderboard, which works fine. Feel free to put the IGT in your run's comment if you want to.

I changed the default run timing from RTA to IGT upon request, as it meant that different hardware that influenced how quickly the game ran wouldn't be a problem, and to keep it consistent with Stunt Track Driver 1. However, after seeing the latest run that was submitted, I realized (or re-remembered, it's been years since I've played the game) that collecting coins increases the timer, and scoring stunts decreases the rate at which the timer falls (Stunt Track Driver 1 does not do this). This means that using IGT results in more of a score-based run than a true speedrun. I don't think that Stunt Track Driver 2 has the same issues regarding slowdown that the first game has either, so I'm tempted to go back to RTA as the default time measurement for Stunt Track Driver 2. Any thoughts?

Hi! Sorry I didn't see this forum post until now. I changed my notification settings so I should see posts more easily in the future.

I added a 100% category like you suggested, I think it's a good idea! Let me know if you have any other suggestions.

Sorry for the almost year-late reply. The primary timing method is in-game time because the game runs at a different speed depending on the computer it's running on and how the game is configured on that computer (VMs, etc). The IGT is simply the sum of the six individual level times in Championship Mode. The real time starts when you click on the green stop light in Championship Mode to start the first level. The real time stops when you drive off the last jump in the Game Room.