Eidos Montreal is still tweaking it, but Deus Ex: Human Revolution uses a Resident Evil 4 style inventory system. In a hands-off demo, a staffer grabbed grenades and a mine off an inventory grid. Weapons that take up multiple squares, tools, and even story items are stored in the same space. David Anfossi, Producer of Deus Ex: Human Revolution, mentioned Resident Evil 4 as an inspiration for the system in one of our interviews.

The recent build I saw had a different gun switching system too. During E3, Eidos Montreal showed a demo with different weapons mapped up, down, left, and right – sort of like a D-pad. This newer build had a rotating system where players spun a digital dial to change weapons. Neither system is said to be final since Deus Ex: Human Revolution is still a work in progress.

Another major change between builds is a HUD. The E3 build had no HUD while the recent demo had a rather busy one. The top left hand corner had Adam’s life bar, which automatically regenerates if he takes cover. A radar is on the bottom left. Between those two indicators, we’ll say middle-left, there are text updates. Notifications appear when Adam gains experience points or picks up ammunition. If Adam was talking to someone, say David Sarif (Adam’s boss) an avatar would pop up on the top right along with a dialogue transcript. Over on the bottom right, players can see Adam’s equipped gun, grenades, and the amount of bullets he has.

The team also shared a new video developed by CG studio Visual Works. Deus Ex: Human Revolution’s "opening video" (in quotes since it takes place a few hours into the game) shows Adam’s augmentation surgery… which looked more like a steamy scene between him and his ex-girlfriend, a fellow scientist at Sarif Industries, than a video from an emergency room.

We’ll have a closer look at Deus Ex: Human Revolution soon with a look at one scene played three different ways and a bunch of developer interviews with your questions coming soon.