It's kind of a pity that the details of the match or the tweaked AI isn't to be found anywhere. That info on the site may look smart, but it really isn't. Christ...aim decreasing over distance was already in UT99, so aside from a nice illustration to people unbeknownst to bot AI, it's not saying anything. The info in the readme file isn't much clearer either...changed code for getting the bot unstuck and tracing humans?
I'm sure that if you take things with a magnifying glass, you may find a difference...but in the two levels I've made for that game, I only seldomly had a bot getting stuck and it was because of bad pathing from my end. Tracing another player based on emitted sounds was also a stock option from the game.
But what got me scratching my head the most is...why UT2004? Bot AI already was incredibly human like (unless you played on the upper 2 difficulty settings...there those guys started bouncing around and twitch aiming a bit TOO good), so increasing it is only adding extra layers of polish (assuming they're talking about deathmatch...on onslaught, assault and bombing run, it could use some tweaks).
Another thing I'm curious about is how the humanness is measured (by spectators or actual players)? And by whom (game veterans, map designers or pc scientists)?
Give me a random game to watch from third person perspective, and I can't tell you who'se the bot. Let me watch in first person mode (yes, the game allows that), and the bot makes pretty much no aim adjustments.
And a flaw on the otherwise near-spotless AI was close range (you REALLY didn't want to go there against a bot: even an average just sidesteps and kills you. even with a sniper rifle). Would be very interesting if that got tweaked to get that panicky-dodgey maneuvre humans do (I'm the kind of player who gets flak monkey pretty much every match, so I KNOW the difference).
Even more curious: is it just
BOT AI? UT2004 had quite some maneuvres like slope dodging or hammer jumping. Level designers have to create an invisible node path system through the level. Which included all the spots where a bot could do all those fancy things (in other words: a bot ONLY does this at this location...and roughly 95% exactly the same time). Would be very interesting if those bots were taught more about the environment without relying on that system.
But to get back to my main question: why UT2004? All the dodge escapades make it very distict from any other FPS'es. Which means that all the work will never get ported to other games. Yes, even in UT3, the physics are so different that most (if not all) of what is coded is worthless (at least: I'd think so. Hard to comment without a better description).
Still...I've got to say: I'm glad it's the best FPS ever* to take this achievement.
*yes, yes, it's my opinion. Feel free to disagree. I don't mind people who are wrong about things. 
Ars Technica
