Choose Classic Marathon
Choose Classic Marathon if it's free to play, so the barrier to trying it is zero. 1,005 Steam reviews back the pick.
Classic Marathon vs Project Corruption
Classic Marathon and Project Corruption both land in Action on Steam, which is why they keep getting compared. The comparison below is built from each game's Steam metadata — release year, genres, categories, Steam Deck status, price, and review score — refreshed daily by imho.run's scraper. Headline differences: Both are Action games on Steam. Classic Marathon (2024) is 5 years older than Project Corruption (2029). Classic Marathon is free; Project Corruption is paid (Price unknown). No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Which should you pick?
Choose Project Corruption
Choose Project Corruption if you want a Strategy, Indie, and Early Access game with HDR available. On Steam, it's the newer release (2029) and ships with the modern feature baseline. Project Corruption launched in 2029.
Both Classic Marathon and Project Corruption sit in Action on Steam and both list Multi-player, Online PvP, and Online Co-op, so either pick lands in the same broad neighborhood. Use the side-by-side table for the feature view, or follow the "Games like" links below to see ranked alternatives for either title.
Side-by-side comparison
 Classic Marathon |  Project Corruption | |
|---|---|---|
| Released | 2024 | 2029 |
| Genres | Action | Action, Strategy, Indie, Early Access |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | Free to play | Price unknown |
| Steam reviews | 90.9% positive (1,005 reviews) | — |
| Multiplayer | Multi-player, Cross-Platform Multiplayer, Online Co-op | Multi-player, Online Co-op, LAN Co-op |
| Developers | Aleph One Developers | Over Scope Games |
Side by side
- Both are Action games on Steam.
- Classic Marathon (2024) is 5 years older than Project Corruption (2029).
- Classic Marathon is free; Project Corruption is paid (Price unknown).
- Both support cooperative play.
- Classic Marathon is Deck Playable on Steam Deck; Project Corruption has no Deck rating yet.
Classic Marathon vs Project Corruption — FAQ
- Should I play Classic Marathon or Project Corruption first?
- If you want chronology, Classic Marathon (2024) came out before Project Corruption (2029). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are Classic Marathon and Project Corruption similar?
- They overlap on Action on Steam, so the catalogue groups them together — but "similar" depends on the specific mechanics. Use the genre + category rows above to decide whether the overlap matches what drew you to the one you've already played.
- Do both Classic Marathon and Project Corruption have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Classic Marathon ships Online Co-op, LAN Co-op; Project Corruption ships Online Co-op, LAN Co-op.
- Is Classic Marathon free?
- Yes — Classic Marathon is a free-to-play Steam title. Project Corruption is paid (Price unknown).
- Does Classic Marathon run on Steam Deck?
- Yes — Classic Marathon is rated Deck Playable by Valve. Project Corruption doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.