Army of Two: The Devil's Cartel was originally titled Army of Four, according to Visceral Games, lending credence to tweets made by Stargate: Atlantis actor Joe Flanigan back in March.
Speaking with Digital Spy, senior producer James Nance said the moniker was due to the game being the "fourth project", not because four-player was included.
"That was an internal thing we had," said Nance. "We had [two Army of Two games] and then there was an expansion pack for Army of Two, so it became Four internally. It's not the fourth installment, it was an in-development, working title. Now it's The Devil's Cartel."
However, four-player multiplayer was considered at one time, but Nance said the team wanted to focus on two-player co-op, because "that's our thing."
"Everything we do is focused around co-op; the level building, the UI, the features, all are focused on getting two guys to work together in an epic Hollywood blockbuster fashion," he said.
"We could have done competitive multiplayer, we could have done four-player or something like that, but we didn't think it was true to what the franchise is.
"Couch co-op, online co-op, we wanted to stick with that."
Competitive multiplayer was eventually dropped due to being "dinged" for attempts at the mode in The 40th Day.
Army of Two: The Devil's Cartel will release in March for PS3 and Xbox 360.