Classic Marathon Infinity

Free sci-fi first-person shooter with a cooperative, story-driven campaign

Aleph One Developers · Released Aug 22, 2024

Reviews: Very Positive; 89% of 301
Recent reviews: Not enough recent
Players: 2; 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 Infinity?

This community-maintained version of Bungie's 1996 first-person shooter takes place in a sci-fi setting where former allies become enemies. You fight through a 20-level campaign alone or in co-op, or battle other players online and over a local network.

For you if...

+you enjoy classic shooters with optional modern presentation settings
+you like story-heavy science fiction alongside the shooting

Not for you if...

−you want an open world rather than a level-based campaign

What players say

89% of 301 reviews are positive

Players praise the classic gameplay and the community's modernization work. Recent reviews frequently describe the plot as cryptic or difficult to follow, and some criticize the oxygen-limited levels.

Screenshots and trailer

Classic Marathon Infinity system requirements

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

As published by the developer.

Can my PC run Classic Marathon Infinity?

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 Infinity 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 Infinity run on Steam Deck?

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

Default controller config not fully functional
Shows Steam Deck controller icons
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: 13
Steam features: Workshop, Cloud saves, Family Sharing
Languages: Text only: English.

Does Classic Marathon Infinity 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