Official specs from Steam

MechWarrior 5: Mercenaries system requirements

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

MechWarrior 5: Mercenaries release infoSteam page Check other games

Minimum

NoteRequires a 64-bit processor and operating system
OSWindows 10 (64-bit versions)
ProcessorIntel Core i3-7100/AMD Ryzen 3 1200
Memory8 GB RAM
GraphicsNVIDIA GeForce GTX 770/AMD Radeon R9 280X
DirectXVersion 11
NetworkBroadband Internet connection
Storage80 GB available space
Additional NotesBroadband internet connection is needed to play and host Co-op games. Internet Connection is NOT Required for Single player once the game is downloaded.

Recommended

NoteRequires a 64-bit processor and operating system
OSWindows 10 (64-bit version)
ProcessorIntel Core i7-6700K/AMD Ryzen 7 1700
Memory16 GB RAM
GraphicsNVIDIA GeForce GTX 1070/AMD RX Vega 56
DirectXVersion 11
NetworkBroadband Internet connection
Storage80 GB available space
Additional NotesBroadband internet connection is needed to play and host Co-op games. Internet Connection is NOT Required for Single player once the game is downloaded.

FAQ

What graphics card do I need for MechWarrior 5: Mercenaries?

Minimum: NVIDIA GeForce GTX 770/AMD Radeon R9 280X. Recommended: NVIDIA GeForce GTX 1070/AMD RX Vega 56.

How much RAM does MechWarrior 5: Mercenaries need?

MechWarrior 5: Mercenaries needs 8 GB RAM at minimum, 16 GB RAM recommended.

How big is MechWarrior 5: Mercenaries?

MechWarrior 5: Mercenaries requires 80 GB available space.

Does MechWarrior 5: Mercenaries run on Mac or Steam Deck/Linux?

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