PC requirements

XCOM: Enemy Unknown System Requirements

XCOM: Enemy Unknown needs at least 2 GHz Dual Core, 2 GB RAM and NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT or greater graphics. For the recommended experience you want 2 GHz Dual Core (Intel Core 2 Duo 2.4 GHz or Athlon X2 2.7 GHz), 4 GB RAM and NVIDIA GeForce 9000 series / ATI Radeon HD 3000 series or greater graphics.

Verified Sources: Steam store listing
XCOM: Enemy Unknown minimum and recommended PC specifications
Component Minimum Recommended
Operating system Windows Vista Windows 7
Processor 2 GHz Dual Core 2 GHz Dual Core (Intel Core 2 Duo 2.4 GHz or Athlon X2 2.7 GHz)
Memory 2 GB RAM 4 GB RAM
Graphics NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT or greater NVIDIA GeForce 9000 series / ATI Radeon HD 3000 series or greater
Storage 20 GB HD space 20 GB HD space
Not sure how your PC compares? Use the Can I Run It checker — pick your CPU and GPU and it tells you which column you land in.

Other platforms

XCOM: Enemy Unknown is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running XCOM: Enemy Unknown on PC

Can my PC run XCOM: Enemy Unknown?
Compare your CPU, GPU and RAM against the minimum column below. If your parts match or beat every minimum row, the game will launch — though you may need to lower settings. Matching the recommended column is what gets you 60fps at 1080p.
How much storage does XCOM: Enemy Unknown need?
20 GB HD space
What is the difference between minimum and recommended specs?
Minimum means the game starts and is playable, usually at 30fps on low settings at 1080p. Recommended is the developer's target for a smooth 60fps experience at high settings.