Bungie has said that it regrets leaving out matchmaking in Halo 3: ODST's Firefight mode.
Speaking with OXM, community boss Brian Jarrard said that in the end, the studio didn't have proper time to include it and admits that this may be one of the reasons ODST is not as popular as other Halo games.
"I regret not being able to go back and make Firefight in ODST work and have match-making," he told the site. "I think we would have loved to have done that.
"We've heard it from the fans, we've heard it from the press. It's definitely something we'd have loved to be able to do but we didn't have the scope on the project. We didn't have the time.
"We accomplished a tremendous amount, but that's probably the reason ODST isn't being played as much right now as we'd like. It has had a shorter lifecycle than any of the Halo titles before.
"But Reach is our big chance to make up for some of those things. "