Straley explains that enemies will work together and, in a world of diminishing resources, they're busy scavenging the same items you are. If they discover a bandage in a drawer, it won't be there for you to discover. It will be on his body though. "You can see the investment we've put into our AI," Straley notes.
"We want every NPC to feel like a real person, like they're gonna protect their friends," the game's lead programmer told Polygon after the demonstration. "You hold a gun to their friends' head, they care about their friend they're gonna try to keep him alive. That's the kind of thing we're headed for."
And despite an enormously cinematic presentation, don't mistake presentation for "scripted" action scenes. The hotel set we saw wasn't necessarily an "open world," the impression I was left with after watching this second play through was that there are many ways to proceed through various locations, with your actions directly changing how enemy characters will respond.
"If i showed a shotgun, that would be completely different than if I showed something else," Straley says. For instance, in the demo we watched, a character ran from Joel because he had a gun, but if he hadn't been armed, it's more likely a hand-to-hand fight would have ensued.
"This is all systemic," Straley explained, drawing a contrast between the heavily scripted interactivity of the Uncharted series and what Naughty Dog is trying to accomplish with The Last of Us.
Our behind-closed-doors play through deviates from the press conference play through around the 3:30 mark in this video: Where Joel jumped into the open window to his right in the video demo, he crouched under the windows in front of him in the other. Joel tossed an empty bottle into one of the rooms getting the guards attention, which provided an opening to sneak through the other room unnoticed. In the video demo, Joel takes down a scavenger but is quickly spotted by another, with a shootout ensuing. In our demo, he puts a gun to a different scavenger's head — "Not a ******* word," Joel warns — before knocking him out.
It's difficult to fully understand a game in a short gameplay demonstration, but if Naughty Dog's goal was to convince the cynical gamers of the world that The Last of Us was different than its excellent, albeit heavily scripted, Uncharted series, it succeeded. "Definitely we are moving away from more scripted. We wanted to give the player more choice, especially with combat," a Naughty Dog developer told us after the demo. "We showed you two examples here of totally different ways to play and there are thousands of different ways to play those sections."