So, I've been wanting to start speedrunning ror. I downloaded version 1.2.2 from the resources tab. I put my 100% save file from the current version to 1.2.2. The thing is 1.2.2 runs really bad. Like it's at 30fps and doesn't go higher with or without v-sync and this is with the graphics at low. But at the current version, it runs 60fps at high no problems. Is this because of the past version? Please help.

Try turning frame skip on/off. Whichever it's not set to currently. The game always runs like shit on the level Risk of Rain, but otherwise it should be running at 60fps on other maps, if it's not after you try frame skip, I'll see if I can help more when I get off work.

Turning off frame skip made my 30fps go to around 50fps, But only on multiplayer. Choosing singleplayer gives me a perfect 60fps. Any fix for making multiplayer faster?

I have no clue tbh. Might have better luck asking in our discord since more people will see it and be able to help. https://discord.gg/0zLmfwETmNEiqVG3