11. Halo Online

Zack: Halo Infinite’s free-to-play multiplayer isn’t the first time Microsoft has tried to take the great action of Halo and give it away for nothing. But its first attempt, the short-lived Halo Online, never really caught on with folks. Thankfully, assets from this failed F2P experiment live on in the Master Chief Collection, but you can’t play the game today in 2021, making it the worst Halo title by default.
Ari: Uh, yeah, what he said!