Most big video games these days are the result of a team of dozens, if not hundreds of people working on them. Amidst all that collaboration, what can one, single human being point to and say “this, this is mine, I made this?”

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In Allen Chou’s case, it’s this.

Chou worked on the game’s AI, mostly “single-player buddies and multiplayer sidekicks”, as well as handling some “gameplay logic.”

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He’s detailed his work on his blog, and for anyone curious about AAA game development, it’s interesting reading.

A lot of the buddy AI in Uncharted 4 was brought over from The Last Of Us, only Drake’s series had something Naughty Dog’s zombie game did not: climbing. So the “post” system that determined where buddies would move (see above) to had to be tweaked.

There was also the matter of how a buddy would share cover with you, how they’d lead you to certain points in a level (if required) and how on-screen characters would look and face if they were talking during gameplay.

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Even if you’re not down on the technical side of the work, it’s still interesting reading the way one guy’s work ties into something that presents to the player as a seamless and complete piece of entertainment.

You can read Chou’s full post here.