Assuming standard rules for runs apply, it would need to be in a single sitting, otherwise it would count as a segmented run as opposed to RTA.

I run a couple 15 minute categories in two games but I want to try something really substantial. Any suggestions for games with long runs? Like 3-4 hours would be a good sweet-spot.

This isn't technically part of the Guantlet series so I'm gonna say...

yeah let's make one.

Yo! We got a discord for this?

Discord here: https://discord.gg/bxwRReZ