PC requirements

Serious Sam: The First Encounter System Requirements

Serious Sam: The First Encounter needs at least AMD K6-3 400MHz, Pentium II or Celeron-A 300MHz, 64MB of RAM and full OpenGL compliant 3D accelerator graphics. For the recommended experience you want AMD Athlon 650MHz or Pentium III 650MHz range processor, 128MB of RAM and nVidia GeForce256 or TNT2 ultra, PowerVR Kyro, S3 Savage2000, 3Dfx Voodoo3, ATI Rage128 pro graphics.

Verified Sources: Steam store listing
Serious Sam: The First Encounter minimum and recommended PC specifications
Component Minimum Recommended
Operating system Windows 95 OSR2, Windows 98, Windows 98SE, Windows ME, Windows NT 4.0 (with Service Pack 5), Windows 2000, Windows XP, Windows Vista or Windows 7 operating system —
Processor AMD K6-3 400MHz, Pentium II or Celeron-A 300MHz AMD Athlon 650MHz or Pentium III 650MHz range processor
Memory 64MB 128MB
Graphics full OpenGL compliant 3D accelerator nVidia GeForce256 or TNT2 ultra, PowerVR Kyro, S3 Savage2000, 3Dfx Voodoo3, ATI Rage128 pro
Storage 600MB free hard disk space 700MB free hard disk 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

Serious Sam: The First Encounter is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running Serious Sam: The First Encounter on PC

Can my PC run Serious Sam: The First Encounter?
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 Serious Sam: The First Encounter need?
600MB free hard disk 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.