Classic Marathon

Classic Marathon

Aleph One Developers · May 10, 2024 · FPS, Shooter, PvP, First-Person, PvE

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

PC
Very Positive91% · 1,2838playing now
This game is free to play. Get it on Steam →

Screenshots

Classic Marathon price

Classic Marathon 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

✦ AI summary

Classic Marathon is a foundational 1994 sci-fi FPS where you fight off alien invaders aboard a space colony ship while uncovering the mysteries of the Tau Ceti system. This legendary Bungie title gets enhanced by the fan-maintained Aleph One engine with modern conveniences like widescreen support and 60+ fps while preserving the original's distinctive gameplay and atmosphere.

Alien forces have boarded the colony ship UESC Marathon in the Tau Ceti system, in orbit around humanity’s first interstellar colony. The situation is dire, and as a security officer assigned to the Marathon, your duty is to defend the ship and its crew from the alien threat.

This classic 1994 Bungie™ FPS had a foundational influence on the genre, and 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.

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

Classic Marathon — 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

What Steam players say

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

Recommended Sep 8, 2026
Clobber aliens in the back of the head at high speed. The combat involves a lot of dodging and positioning. Shooting enemies feels satisfying. Ammo is somewhat sparse at the start, but you eventually end up with more than enough ammo. This game leans into the space ship aesthetic, which is fun. Flying around in low gravity is fun. Since this game supports room over room, and other features which no other game did at the time, there is a lot of variety and verticality in the level design. The plot is highly interesting and continually gets crazier. Fun game. Keep playing past the first level and the levels get more elaborate. I recommend trying the music mods on the workshop to enhance the soundtrack. My only complaints are sometimes you press a switch that does something across the map which you cannot see immediately, which is fairly old school and never really happens in Marathon 2 or 3, and I think the graphical filter should be off by default.
4 found this helpful
Recommended Sep 14, 2026
A piece of history. A very claustrophobic piece of history. But it is great and free
3 found this helpful
Recommended Sep 8, 2026
hahahahahahaha its better and its free
Recommended Sep 7, 2026
I cant believe this is the same developer that made halo 10/5
Recommended Sep 5, 2026
super fun gunplay, levels layout can be a bit confusing tho, love how it looks too design and graphics wise, great game overall
Recommended Sep 5, 2026
Marathon was one of the first games I ever played back on my dad's PowerPC. Glad to be able play it today. Still get jumpscared sometimes

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