Which repository has the largest number of games: Proton, Steam, Heroic, and others?

Here's the latest information on the number of games available and catalog compatibility for Steam, Proton/ProtonDB, Heroic (Epic via Heroic), the Epic Games Store, and GOG. The answer is simple: Steam has the largest catalog by far.

Quick comparison (summary)

• Steam — largest catalog by a wide margin (millions of product entries including games, DLC, apps; hundreds of thousands of distinct playable games).

• Epic Games Store (via Heroic) — far smaller than Steam (tens of thousands of titles). Heroic is a launcher that accesses Epic’s catalog; it does not itself host a larger catalog than Steam.

• GOG — smaller than Epic; focused on curated DRM‑free catalog (thousands of titles).

• Proton / ProtonDB — not a storefront; Proton is a compatibility layer for running Windows games on Linux and ProtonDB is a community database of compatibility reports covering many Steam/Epic/GOG titles. ProtonDB’s entries reflect games from other stores rather than being a separate catalog larger than Steam.

Catalog size — quick sourced counts

Platform	Most relevant metric	Count (approx.)
Steam (store)	Total store listings / games	~70,000–60,000 playable games.
Epic Games Store (catalog)	Total titles available on Epic	~10,000–12,000.
GOG (catalog)	Total games on GOG	~7,000–8,000.
Proton / ProtonDB	Proton is a compatibility layer; ProtonDB entries reflect games tested (not a storefront)	ProtonDB lists ~100,000+ game reports / entries (covers many Steam/Epic/GOG titles).
Heroic (launcher)	Heroic is a third‑party launcher for Epic/GOG/other stores; it does not host its own catalog	Uses Epic/GOG catalogs (so smaller than Steam).

Short explanation and context

• Steam has by far the largest game catalog among the stores you listed; its store hosts tens of thousands of distinct playable games, plus DLC and non‑game products.

• Epic Games Store (and therefore Heroic when it accesses Epic content) has a much smaller catalog than Steam — on the order of ten thousand titles. Heroic itself is a launcher and doesn’t add extra unique titles beyond the stores it connects to.

• GOG is more curated and smaller than Epic and Steam.

• Proton is not a store; ProtonDB is a community compatibility database that aggregates reports for many games across stores — its entry count can exceed individual store catalogs because it covers titles from Steam, Epic, GOG, and others.

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About Giampaolo Rossi.

Fond of computer and video games. Stay informed of the latest news on games for Linux and Android. The future of gaming is in Linux. All you need to know about How to play Windows games on Linux.