If you’ve been curious about Marathon but haven’t wanted to pay for it, now’s your chance to actually try it out. Bungie have announced an Open Play Week for their extraction shooter, giving everyone free access to the full game from 8 to 15 December to coincide with the launch of its next major update, Symbiosis.
What’s in Marathon’s Symbiosis update?
The headline addition is Expeditions, a new PvE mode and the first phase of what Bungie say will be a permanent PvE offering. It’s certainly a major change for a game built around tense PvPvE extraction runs, and could make Marathon a lot more welcoming to players who’d rather not fight other teams.
Symbiosis also adds a new shell (Marathon’s version of a playable character class) called Bishop, an updated version of the Perimeter map, and new gear and rewards.
Marathon Open Play Week details
From 8 to 15 December, anyone can download and play the full game, including all of Symbiosis’ new content. If you buy Marathon after the free week ends, you’ll keep all your items and progression, including loot, XP and faction upgrades earned in Extraction.
Crew Up event rewards
Alongside Open Play Week, Bungie are running a co-op event called Crew Up, which runs from 8 December at 12pm PT until 22 December at 10am PT. Players team up in Expeditions to complete a series of increasingly demanding challenges, unlocking cosmetic rewards along the way:
- Emblem: Bring the Crew
- Background: Stronger Together
- Weapon sticker: Code Redeemed
- Weapon charm: Escape Together
- Destroyer skin: The Real Treasure
- Title: Exterminator
To take part, you need to redeem the code DMA-T7Y-XJL on Bungie.net, which unlocks an Events section in the in-game Codex. The challenges can’t be completed solo: you’ll need at least one other player who’s also redeemed the code and is on your friends list, either on Bungie.net or on the same platform.
After Open Play Week ends, you’ll need to own Marathon to keep playing the event during its final week.
Marathon is a sci-fi extraction shooter from Bungie, the studio behind Halo and Destiny, set on the planet Tau Ceti IV. It launched earlier this year on PlayStation 5, Xbox Series X|S and PC, and is Bungie’s first new game since being acquired by Sony.





















