Alright, best insane mode speedrun as of now.

This speedrun uses a bug (the pause bug), which makes cutscenes play without affecting the in game time.

In addition, this speedrun makes use of fullscreened SW2, making some things easier in general.

There were also a few level retries in this run.

In total, even including retries and no bugs, this run does beat yeahiwin1's run, both IGT and RTA-wise. I actually beat his run once on a discord stream without upgrades, but I didn't record so yeah.

It was a fun run; learnt a lot through it. Hell, today I even made a breakthrough and discovered that Albows are the fastest way to beat Medusa (glory for albows lol). Thanks a lot to 75g for helping me with some levels when speedrunning this.