Top 10 Most Influential Codes of All Time (post your list)

[Fifty]

I would add the customizable lap & speed modifier by MrBean, maybe a part of the main list or maybe an honorable mention. Every single custom track that uses a lap count not equal to 3 or a speed mod not equal to 1.0x uses that code for it to function properly, and that adds up.

You can read more about it here - https://wiki.tockdom.com/wiki/Lap_%26_Speed_Modifier