Stepmania 5 extra stage requirement change

Is there any way to change the requirements to get to the extra stage?

You can change the required grade and difficulty. If you want to change anything else, you'll have to do a workaround. The way I do it is making the grade and difficulty requirements so lenient that passing with any grade on any difficulty is sufficient to earn an Extra Stage. Then, in the post-evaluation branch function, I check the actual Extra Stage condition, and if that fails I just send the game to the summary evaluation screen, which effectively deprives the player of the Extra Stage SM thinks they earned.

Make your own via lua scripting with Extra Stage setting disabled. You can use environmental variables and flags to call your own extra stage. If Extra Stage flag return true, just add stage to anyone (or both if 2 player mode).

Yes, like FlameyBoy have said you could use the branches file, and build your own function, you could do practically whatever you like, and are not depending on metrics or other stepmania built in validations.

I don't know where the branches file is. Could you tell me where it is?

In the scripts folder. If the file not exists, copy it from the fallback theme.

I got the branches file in the default theme but I don't know what to type in it to change requirements. what do I type? (sorry for the late response, been real busy)