Classic Marathon

A classic first-person shooter about defending a colony ship from aliens

Aleph One Developers · Released May 10, 2024

Reviews: Very Positive; 90% of 1,391
Recent reviews: Very Positive; 94% of 17 in 30 days
Players: 3; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 3 weeks ago; Oct 1, 2026
Minimum PC: 4 GB RAM · 0.1 GB disk; Full requirements

What is Classic Marathon?

This free, community-maintained version of Bungie's 1994 first-person shooter takes place aboard the UESC Marathon in the Tau Ceti system. As a security officer, you fight through linear levels to protect the crew after aliens board the ship.

For you if...

+you enjoy shooters with reloading, vertical aiming, and dual-wielding
+you want co-op or competitive multiplayer alongside solo play

Not for you if...

−you prefer modern visuals over a classic nineties presentation

What players say

90% of 1,391 reviews are positive · 94% of 17 in the last 30 days

Players praise the terminal-based storytelling and modern display options. Some criticize the default camera and HUD settings and recommend adjusting them before playing.

Screenshots and trailer

Classic Marathon system requirements

Minimum: 4 GB RAM, 0.1 GB of disk space.

As published by the developer.

Can my PC run Classic Marathon?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

OS: Windows 10
Processor: 64-bit Processor
Memory: 4 GB RAM
Storage: 100 MB available space

Does Classic Marathon have co-op or multiplayer?

Yes: co-op online and LAN; PvP online and LAN. It also has a single-player mode. Crossplay with other platforms is declared.

Does Classic Marathon run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Sometimes shows mouse, keyboard or non-Deck controller icons
Some text entry requires manually opening the on-screen keyboard
All functionality is accessible with the default controller configuration
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows, macOS, Linux
Achievements: 12
Steam features: Workshop, Cloud saves, Family Sharing
Languages: Text only: English.

Does Classic Marathon use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam