LB:EF - Mission 22 (currently playing)
I've replayed through the previous levels and this is the level I was stuck on before and I'm stuck on it now. You need to build advanced buildings and survive for 25 minutes while being attacked by GCP forces. You get a few brief moments to prepare yourself before the GCP recruiters, musicians, thugs and soldiers swarm in. There often tends to be a lot of things going on at once, so it's difficult to keep track of everything. (I keep failing the "peaceful mission" goal as a result.) I'll give the level a few more tries before moving on.