Marathon Season 3 Release Date & Guide

Bungie's Marathon Season 3 release date is September 22, 2026, confirmed straight from a Key Dates blog post, so mark it before you forget the game exists again. The extraction shooter launched on March 5, 2026, and this will be its third seasonal reset since then.

Season 3 rides in on the back of Season 2, called Night Marsh, and brings a handful of changes Bungie is willing to talk about publicly. The headline items are a revamp of the starting map Perimeter, a new Runner shell, fresh weapons and equipment, and a full Marathon PvE mode that Bungie has been teasing since players complained loudly enough.

What's Actually Changing

• Perimeter, the map every new Runner is dumped into first, gets major new areas and encounters because apparently the safest zone in the game needed to stop being safe.
• A new Runner shell arrives to shake up the meta the same way the Sentinel did back in Season 2.
• Bungie promises new weapons, mods, and the usual vague pile of unspecified content and surprises.
• The long awaited full PvE mode is scheduled for Season 3, though Bungie still refuses to say whether it drops day one or mid season.

The Marathon Bungie team is using Vault Breaker, a temporary PvE only experiment running from July 21 to August 4, as the testing ground for that eventual full mode. Feedback from Vault Breaker directly shapes what ships in September, so if you skipped it, someone else designed your future update for you.

Marathon was sold as a PvPvE extraction shooter, yet Bungie's post launch plans now lean on PvP lite queues, a temporary PvE only event, and a full PvE mode nobody originally asked for at launch.

Context helps explain the pivot. Marathon peaked at 88,337 concurrent players on Steam the day after its March 5 launch. That number has since collapsed by over 93 percent, which is the kind of decline that gets a "PvE mode" fast tracked whether the original design doc liked it or not. The game is set on Tau Ceti IV, a colony planet that has clearly seen better decades, much like the player count.

Season Timeline So Far

The Marathon Season 3 start date of September 22 lands roughly a month before Gamescom 2026, so expect a splashy Cologne trailer if Bungie wants headlines that aren't about player retention. Bungie also confirmed that season Rewards Passes never expire, meaning you can buy Season 1's pass in Season 3 if you enjoy paying for content everyone else finished months ago.

No firm date exists yet for when the PvE mode itself goes live within the season, and Bungie has stayed quiet on mission count or reward structure. Until an actual patch note appears, everything past September 22 is a promise, and promises are the one resource Marathon has never run short of.