Are you trying to make the doors open at the same time? It's easy, just give all the brushes part of the door the same targetname, and give a trigger_multiple the same target as the doors' targetname.
Or you can put them on the same team.
Feedback:
- The lighting in the middle needs to be like 10x's brighter. I couldn't see squat, and I know many people have darker monitors than I do.
- Some of the paths seem just unnecessarily cumbersome. Why is there a pile of crates blocking the tunnel entrance, for example?
- I'm not sure 4 flags are necessary here, at least, not in this configuration. With 1 flag per side, there are many paths in to the base. With 2, players will likely take the same path in order to grab both flags quickly, and it becomes easier to defend (more predictable). Plus a single player can defend both flags, so it doesn't really cut back on "camping".
- It's nice that you have a somewhat direct non-trick jump path to second flag from the first, but jumping from the box to that little edge of barrel then to the ladder is more awkward/difficult than learning to trick jump, I think. Why not just make the ladder go all the way to the ground and have the trick jumps just be a short cut?
Map is up on the beta server.