I'm not well versed with the Unreal Editor, but I was wondering if it'd be possible to copy AI behavior from other games and use them for Gears.
I stumbled onto a post by one of the modders here that gave instructions on how to play online modes with bots offline. Unfortunately, AI for the bots have to be manually implemented. Looking at another UE3 game, Unreal Tournament 3, I realize that these games share similar game modes. Even better, UT3's bots know how to actively participate in offline matches across a multitude of different scenarios. So I began thinking, is it possible to extract the code programming the bots in UT3 and implement them in the bots for Gears?