Is Classic Marathon Infinity free?

Yes — Classic Marathon Infinity is free to play, so you can install and play it without buying anything.

Is Classic Marathon Infinity Steam Deck compatible?

Mostly. Valve rates Classic Marathon Infinity Playable on Steam Deck: it runs, but may need some manual tweaking — a community controller layout, or zooming in on small text.

Can I play Classic Marathon Infinity on Mac?

Yes. Classic Marathon Infinity has a native macOS version on Steam.

Does Classic Marathon Infinity have co-op?

Yes — Steam lists Classic Marathon Infinity with online co-op, LAN co-op.

Does Classic Marathon Infinity have crossplay?

Yes — Steam lists Classic Marathon Infinity with cross-platform multiplayer, so players on Steam can play with players on other platforms. Steam does not say which platforms; the developer's site has the full list.

Is Classic Marathon Infinity on PC Game Pass?

No — Classic Marathon Infinity is not on PC Game Pass right now.

Classic Marathon Infinity

Name: Classic Marathon Infinity
Brand: Aleph One Developers
Availability: InStock

Aleph One Developers · August 22, 2024 · FPS, PvP, PvE, Shooter, 2.5D

Classic Marathon Infinity is free to play — no purchase needed. We track it so you know if that ever changes.

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Very Positive89% · 2856playing now

Best price

Free

Get it free on Steam

This game is free to play. Get it on Steam →

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Classic Marathon Infinity price

Classic Marathon Infinity is free to play — there is no purchase price, on Steam or anywhere else we track. We keep watching it, so if it ever stops being free the price history on this page will show when that happened and what it changed to.

About Classic Marathon Infinity

✦ AI summary

Classic Marathon Infinity is a 20-level sci-fi FPS campaign where you battle the Pfhor and navigate a world of betrayal and cosmic mystery. The fan-maintained classic now features modern quality-of-life enhancements like widescreen support and 60+ fps while preserving the original 1996 Bungie gameplay that defined the genre.

Marathon Infinity takes the closed universe of the Marathon series and blows it wide open. The solo/co-op campaign, “Blood Tides of Lh’owon,” is a 20-level scenario sporting new textures, weapons, and enemies. More than that, the scenario sheds a surprising new light on the story’s characters and the meaning of events. Having defeated the Pfhor and reawakened the ancient remnants of the S’pht, the player now faces a world where friends become enemies and all is not what it seems…

This classic 1996 Bungie™ FPS is now maintained by the fan community. Experience authentic game play using the original data files, with optional widescreen HUD support, 3D filtering/perspective, positional audio, and 60+ fps interpolation, just in case the original is too authentic.

Marathon Infinity is powered by the Aleph One engine, which is available under the terms of the GNU General Public License (GPL) Version 3.

Classic Marathon Infinity — game info

Platforms: Windows, macOS, Linux / SteamOS
Steam Deck: Playable
Player modes: Single-player, Online PvP, Online co-op, LAN, Cross-platform multiplayer
Controller: Partial controller support
PC Game Pass: Not included

More games like this:Mac games Linux games Crossplay games

Classic Marathon Infinity — questions & answers

Is Classic Marathon Infinity free?: Yes — Classic Marathon Infinity is free to play, so you can install and play it without buying anything.
Is Classic Marathon Infinity Steam Deck compatible?: Mostly. Valve rates Classic Marathon Infinity Playable on Steam Deck: it runs, but may need some manual tweaking — a community controller layout, or zooming in on small text.
Can I play Classic Marathon Infinity on Mac?: Yes. Classic Marathon Infinity has a native macOS version on Steam.
Does Classic Marathon Infinity have co-op?: Yes — Steam lists Classic Marathon Infinity with online co-op, LAN co-op.
Does Classic Marathon Infinity have crossplay?: Yes — Steam lists Classic Marathon Infinity with cross-platform multiplayer, so players on Steam can play with players on other platforms. Steam does not say which platforms; the developer's site has the full list.
Is Classic Marathon Infinity on PC Game Pass?: No — Classic Marathon Infinity is not on PC Game Pass right now.

DLC & expansions

Free to play

Classic Marathon Infinity - Coriolis Loop Netmap Pack

Free

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Oct 11, 2026

This game rules. Yes the story is nigh incoherent and requires hours of poring over every detail to begin to get what's happening with the Wrrcncackter or whatever it's called, but the gameplay and visuals are so damn good it makes you want more and more.

Not recommended Sep 27, 2026

Worse of the series. This game costs too much.

Recommended Sep 27, 2026

whoever thought 2 vacuum levels back-to-back was a good idea is has no soul good game though love marathon

Not recommended Sep 26, 2026

This game is just pretentious BS, with ♥♥♥♥♥♥ gameplay to top it off. Don't play this.

Recommended Sep 20, 2026

You Are Destiny

Recommended Sep 19, 2026

Path ate.

Community reviews

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