So, I've done some messing around with the TAS tool on FCEUX for this game trying to understand the RNG involved and if there are any ways to manipulate it to your advantage.

From my findings, I would say that it's pretty much impossible. In setting up the first boss (belt) for the optimal pattern, I found that the FRAME you take out the mob on the ladder before going into the vial room, will change how the boss acts.

The final boss seems to be even more random. Whether or not he stops and laughs (turns red and vulnerable) changes based on how you move and if you shoot a fruit. It seems that turning your back makes him stop more often, perhaps - it's extremely hard to tell.

In addition, drops/demon spawns seems to be based on a 6 frame or so window, and the game requires at least 2 frames between any actions.

I'm not sure if this translates to the Genesis version of the game or not. But if anyone who is more versed in HEX and understanding the works of games would take a look at this, that would be great.

Could we get the following categories added for the NES version please?

All Armor

All Armor + All Hearts

100%

Thanks!

Could we get some ground rules for NES Any%, namely no Game Genie codes for everything/invulnerability?