Here’s a tutorial on how to add deathmatch bots to a level. Done correctly you could also use this method to trigger enemies in a normal game to pop up, as I’ve done in the FPS game “Jack Walsh”. I’ll soon make a post about this game, and also add it to the My Game Projects page. Click the screenshot picture or click here to take a look at it, if you’d like.
This video is now added in the UDK Tutorials page, in the AI section.