PC requirements

I Have No Mouth, and I Must Scream System Requirements

I Have No Mouth, and I Must Scream needs at least IBM PC with a 233Mhz 486 processor, 64 MB RAM and A VESA compatible Super VGA card graphics. For the recommended experience you want IBM PC with a 486 DX2/ 66Mhz (or faster) processor, 128 MB RAM and A VESA compatible Super VGA card graphics.

Verified Sources: Steam store listing
I Have No Mouth, and I Must Scream minimum and recommended PC specifications
Component Minimum Recommended
Operating system Windows 7 / 8.1 / 10 Windows 10
Processor IBM PC with a 233Mhz 486 processor IBM PC with a 486 DX2/ 66Mhz (or faster) processor
Memory 64 MB RAM 128 MB RAM
Graphics A VESA compatible Super VGA card A VESA compatible Super VGA card
DirectX Version 9.0c Version 9.0c
Storage 2 GB available space 2 GB available space
Additional notes Sound Blaster AWE32 sound card Sound Blaster AWE32 sound card
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

I Have No Mouth, and I Must Scream is also available on these systems, where hardware is fixed and no per-PC check is needed:

PlayStation 5 Xbox Series X|S Nintendo Switch PlayStation 4 Xbox One Android DOS iOS Linux Mac PC (Microsoft Windows)

Quick answers

Running I Have No Mouth, and I Must Scream on PC

Can my PC run I Have No Mouth, and I Must Scream?
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 I Have No Mouth, and I Must Scream need?
2 GB available 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.