Just a few relatively minor things I've picked up:
1) There doesn't appear to be a "die" animation for Orcs? They just keep replaying the same animation over and over when they die, rather than playing the animation once, and then lying flat with no animation??
2) There are a couple of Weapon fx "not found" errors in the log, these appear to be related to the default particles in the Weapon Editor (mp2_explosion_26.pu & mp_bullettrail_05_large_b.pu)??
3) I have about 10 Orc NPCs in the level. The first one dies relatively easily, but every one after that seems to only take 1 damage per bullet?? Even with 4 Ammo Crates, and 4 Health pickups, I can hardly get past the first 5!!
BTW I'm just using the default NPC & FPS Player.
Everything else is pretty cool from what I've seen so far

Regards
Shando