
The demo shown at the Game Developers Conference indicated that much of the core gameplay elements that were central to Gears of War (a third-person game that has a heavy emphasis on using protective cover rather than "run and gun" style game play) would be present in the sequel.
John DiMaggio, the voice actor of the game's main character, Marcus Fenix, confirmed to IGN that players would be able to fight the large Brumaks in Gears of War 2. He also revealed there will be a deeper story with new characters, new weapons, and new enemies.[6] The game will also include the ability for a player to duel with an AI or human opponent when both use the chainsaw attachment of the Lancer rifle, as seen in the 2008 Game Developer's Conference promotional video, later confirmed in informal interviews with developers[7][8] and a Game Informer preview. Epic released a gameplay video which revealed the player may now use "downed" enemies as human shields. Cliffy B confirmed also that players whom have been injured can crawl, as a final desperate attempt at life. Players would tap the 'A' Button to crawl faster etc. The level of blood and gore will also be increased, for example, when the player is close to death, wherever he moves there will be trails of blood behind him etc. This is the same for enemies, and the opponents who've been used as a meat shield. There will also be more ways to kill an opponent, such as punching them whilst they are downed.
The cover story in the May 2008 issue of Game Informer revealed several new gameplay features. Players can now play on individual co-op play settings. One player may, for instance, play on Casual while the teammate plays on Hardcore. A "communal combat system" will adapt to give a player at a lower difficulty an equivalently fair challenge at the player at higher difficulty. The player will be able to maintain multiple save files that work with the drop-in/drop-out co-op features. There will also be a fourth difficulty level that is a level below Casual; senior producer Rod Fergusson admitted that — for the first game — "We overshot on [the Casual] difficulty and a game that was a little harder than we intended." Some of the Xbox Live achievements can be completed through both play in single player and multiplayer mode, such as achieving 1,000 headshots. New enemy creatures are planned on being added, including one described by Cliff Bleszinski as one "that [makes] the Brumak look like a baby panda bear." Several unique weapons will be included in the game as well.
The collection of COG tags has been expanded to include the collection of story-based items such as personal letters and medical records, and a "war journal" will track which collectibles have been found and where missing ones can be located. Cutscenes now feature interactive conversation trees. The cut-scenes will also use the better facial rendering technology of the Epic engine, and will use more dramatic angles for the conversation, as well as using a video screen on Jack (the all-purpose robot used by Dominic) to talk with their commanders "face-to-face"