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Original post by parrotbait Well I eventually pitched my Masters as Enhanced NPC behaviour using GOAP. Still at a reasonably early stage but thing I'm going to do a Unreal Tournament mod and have squad behaviour controlled using HTN and other behaviour using hierarchial FSMs and compare results.

Sounds good. Remember that the goal is not to make an unbeatable AI (which is rather easy in a FPS), but to make one that is enjoyable and believable. Thus when comparing results, you should include playtest with live players.

There is a lot to consider in GOAP, especially the method of space search (backtracking, forward, both way, contraints posting), as well as knowledge representation. You should have enough for a couple of years of fun :)