Official specs from Steam

Marathon system requirements

Minimum and recommended PC specs as listed by the developer on Steam.

Minimum

NoteRequires a 64-bit processor and operating system
OSWindows 10 64-bit (latest Service Pack)
ProcessorIntel Core i5-6600 / AMD Ryzen 5 2600
Memory8 GB RAM
GraphicsNVIDIA GeForce GTX 1050 Ti (4 GB) / AMD Radeon RX 5500 XT (4 GB) / Intel Arc A580 (8 GB, with ReBAR on)
DirectXVersion 12
NetworkBroadband Internet connection

Recommended

NoteRequires a 64-bit processor and operating system
OSWindows 10 64-bit (latest Service Pack)
ProcessorIntel Core i5-10400 / AMD Ryzen 5 3500
Memory16 GB RAM
GraphicsNVIDIA GeForce RTX 2060 (6 GB) / AMD Radeon RX 5700 XT (8 GB) / Intel Arc A770 (16 GB, with ReBAR on)
DirectXVersion 12
NetworkBroadband Internet connection

FAQ

What graphics card do I need for Marathon?

Minimum: NVIDIA GeForce GTX 1050 Ti (4 GB) / AMD Radeon RX 5500 XT (4 GB) / Intel Arc A580 (8 GB, with ReBAR on). Recommended: NVIDIA GeForce RTX 2060 (6 GB) / AMD Radeon RX 5700 XT (8 GB) / Intel Arc A770 (16 GB, with ReBAR on).

How much RAM does Marathon need?

Marathon needs 8 GB RAM at minimum, 16 GB RAM recommended.

Does Marathon run on Mac or Steam Deck/Linux?

There is no native macOS version. There is no native Linux build (Proton compatibility may vary).