Gears of War 2 dev lead Cliff Bleszinski, speaking at a recent event for the game in London, said that additions to the sequel over the first title have moved it from a game into a "platform."
"It's no longer a game: it's a platform," he said. "Each mode is huge.
"The campaign's longer, the co-op has two… basically you can play through the campaign and then Horde, as well as the many multiplayer modes.
The sequel's longevity isn't in question, said the developer, who said the idea of the game's development was to "build a package that people will play for months, if not years, to come."
Gears of War 2 ships for 360 on November 7. For the rest of our coverage from the event, including play impressions and new shots, click this.