For Damien, you need to help him when is confronted by the bully, Alex.
Then don't turn him down when he asks you out.
For Kate's Romance Route, you need to join the Cafe then not proceed down the corruption path with that. That means not picking choices that are slutty.
As for the Arcade, it triggers immediately after the library scene with Alice, but for the public build it wasn't added in yet.
For Violet and Matt those events are pretty far into their routes and what there is of the current content for those.
I based how far into the route I am by how many of the CGs I had in the gallery. Are there multiple different ways to do each of their paths or something? For Violet and Matt I was missing a ton of cgs. I still think I didn’t get to the end of their route because it cut off rather suddenly. Kate and Damien I just messed up I suppose.