A tutorial for getting the UDK into a state for a single-player style game would be nice.
I followed this guide which was helpful from the asset side of things, but didn't give much help in the way of how to program the controller.
A small tutorial on how to make very basic "Doom" style NPCs (i.e. ones that stand still until alerted and then will shoot the player when it's in sight) would be a huge help.
Any other tips on what should be done to the environment would be great too - I think the game is currently defaulting to some sort of "Deathmatch" mode and I'm not sure what that implies.
It's not an immediate concern for me but a seperate or related tutorial on how to spawn weapons/powerups that can be picked up would certainly be a big help too.