For some rather odd reason, whenever the countdown reaches zero my FPS drops a bit (on my large ones it drops to 30) and NOTHING spawns. I'm honestly stumped on what the problem is.
Also it would be AMAZING if you could make an empty level where the invasion mod only works.
johuthaBlobord Notice how the Besiege version in the title is v0.23, not v0.27? Mods generally don't work for any version except the one they were written for (unless they're very very simple). So unless you or someone else comes along and rebuilds and fixes the mod for v0.27, you're pretty much completely out of luck. End of story.