Because the game has a really good in game time, all runs will take in game time as the main method (you can still time with livesplit etc...). Some newer runners don't realise that it's easy to work out in game time without going into the stat menu and seeing when the game says you completed the game (yes it has this feature).

How to work out what your in game time is for any%:

Step 1: IGT starts when you exit the house at 6:00 (0:00)

Step 2: When you finish the game, before the game fades look at the in game clock. Whatever that is will be your in game time.

Image before screen fade

This is current WR so the timer is at 8:08.

Step 3: do the math

Start: 6:00 (0:00) End: 8:08 (2:08)

It took 2 minutes and 8 seconds to beat the game.

For any% NSG and 100%, you MUST show in game time once you finished the run in the vod.