I Have No Mouth, and I Must Scream

I Have No Mouth, and I Must Scream is a singleplayer cinematic camera adventure game.

German and French version have the Nimdok chapter removed, making achieving the "best" ending more complicated.

General information

Can be run under ScummVM.

Availability

Source	DRM	Notes	Keys	OS
Retail
GamersGate
GOG.com		Comes pre-configured with ScummVM.
Green Man Gaming
Humble Store
Steam		Comes pre-configured with ScummVM.

All digital versions are preconfigured with ScummVM.^[4]^[5]

Demo

A demo is available from ScummVM.

Essential improvements

Higher quality music (ScummVM)

The GOG.com and Steam releases include the original soundtrack in MP3 format, taken from the composer's original master tapes.^[6] It can be formatted for use in ScummVM by following this guide. A batch script for use with MP3Split can be found on the GOG.com forums.

Game data

Configuration file(s) location

System	Location
DOS
Windows	<path-to-game>\SCREAM\^{[Note 1]}
Mac OS (Classic)
macOS (OS X)
Linux

It's unknown whether this game follows the XDG Base Directory Specification on Linux. Please fill in this information.

Save game data location

System	Location
DOS
Windows	<path-to-game>\SCREAM\Scream.sav^{[Note 1]}
Mac OS (Classic)
macOS (OS X)
Linux

Save game cloud syncing

System	Native	Notes
GOG Galaxy
Steam Cloud

ScummVM 2.1+ supports cloud saves on third-party cloud storage services. See the ScummVM documentation for details.

Video

In-game options menu.

Graphics feature	State	Notes
Widescreen resolution		640x480 only.
Multi-monitor
Ultra-widescreen
4K Ultra HD
Field of view (FOV)
Windowed		For DOSBox toggle with `Alt`+`↵ Enter` (see the glossary page for other workarounds).
Borderless fullscreen windowed		See the glossary page for potential workarounds.
Anisotropic filtering (AF)
Anti-aliasing (AA)
Vertical sync (Vsync)		For DOSBox use an unofficial build (see the glossary page for other workarounds).
60 FPS
120+ FPS		Cursor frame rate is capped at 85 FPS.

Input

Keyboard and mouse	State	Notes
Remapping		For DOSBox use the DOSBox Mapper (see the glossary page for other workarounds).
Mouse acceleration
Mouse sensitivity
Mouse input in menus
Mouse Y-axis inversion
Controller
Controller support		For DOSBox use the DOSBox Mapper (see the glossary page for other workarounds).

Controller types

Audio

Audio feature	State	Notes
Separate volume controls
Surround sound
Subtitles
Closed captions
Mute on focus lost		For DOSBox change the `priority` background value in the DOSBox configuration file.
Royalty free audio
General MIDI audio

Localizations

Language	UI	Audio	Sub	Notes
English
Traditional Chinese				Retail only.
French
German
Italian
Korean
Brazilian Portuguese				Translation.
Russian				Fan translation, download
Spanish

Issues fixed

Finishing with the German or French version

You don‘t actually need Nimdok to activate the bridge in the last sequence. Even though he is the only one who knows the password right away, the others can simply guess it. Just try entering codes at random two or three times and the character will guess the correct answer.^[7]

Other information

API

Technical specs	Supported	Notes
DOS video modes	SVGA

Executable	PPC	16-bit	32-bit	64-bit	Notes
macOS (OS X)				^[8]
Mac OS (Classic)

System requirements

DOS
	Minimum	Recommended
Operating system (OS)	4.0	6.22
Processor (CPU)	Intel 486 33 MHz	Intel 486DX2 66 MHz
System memory (RAM)	8 MB
Hard disk drive (HDD)	15 MB	115 MB
Video card (GPU)	SVGA
Sound (audio device)		Sound Blaster AWE32
Other	2X CD-ROM

Windows
	Minimum	Recommended
Operating system (OS)	XP	Vista, 7, 8, 8.1
Processor (CPU)	1.8 GHz
System memory (RAM)	512 MB	1 GB
Hard disk drive (HDD)	2 GB
Video card (GPU)	DirectX 9.0c compatible

Mac OS
	Minimum
Operating system (OS)	7.1
Processor (CPU)	Motorola 68000
System memory (RAM)	8 MB
Hard disk drive (HDD)	15 MB

macOS (OS X)
	Minimum
Operating system (OS)	10.7
Processor (CPU)	Intel Core 2 Duo 2.0 GHz
System memory (RAM)	1 GB
Hard disk drive (HDD)	1 GB
Video card (GPU)	256 MB of VRAM

Linux
	Minimum	Recommended
Operating system (OS)	Ubuntu 14.04 LTS
Processor (CPU)	1.8 GHz
System memory (RAM)	512 MB	1 GB
Hard disk drive (HDD)	2 GB

There are known problems with the following video card chipsets: Diamond Viper (VLB) Weitek Pow. 9000-033-PFP; Cirrus Logic (Embedded) CL-GD5424-80QC-C and GD-GD5428-

80QC-A; Hyundai (VLB) S3-86805; Pro Designer II (ISA) Tseng Labs ET4000; Western Digital (Embedded) WD90C31

Notes

↑ ^1.0 ^1.1 When running this game without elevated privileges (Run as administrator option), write operations against a location below %PROGRAMFILES%, %PROGRAMDATA%, or %WINDIR% might be redirected to %LOCALAPPDATA%\VirtualStore on Windows Vista and later (more details).

References

↑ ^1.0 ^1.1 MGM Interactive press release: I Have No Mouth, and I Must Scream
↑ Release: I Have No Mouth and I Must Scream - GOG.com - last accessed on May 2023
↑ ^3.0 ^3.1 News - Now Available - I Have No Mouth, and I Must Scream
↑ Changelog:, page 1, post 6 - Forum - GOG.com - last accessed on May 2023
↑ I Have No Mouth, and I Must Scream · AppID: 245390 · Steam Database - last accessed on 9 June 2023
↑ Enhanced Soundtrack in IHNMAIMS: How-To - ScummVM :: Forums (quoting Stephen Kick) - last accessed on 2019-10-02
"The story behind the bonus OST is really interesting, when we started the development of the re-release of IHNMAIMS we learned from Harlan Ellison that the guy who created the soundtrack is none other than John Ottman who became an award winning composer for Hollywood movies including the most recent XMen movie. We were able to contact his agent and ask him about the soundtrack. Luckily he still had the original Data tapes from his sessions in a storage locker. He paid to have them found and digitized and then finally sent to us so that we could include them with the game. Pretty freaking amazing if you ask me. Not only are they of much higher quality but they also included the 21 additional tracks which never made it into the game. We decided to include them because we thought they would provide some really fascinating content for fans of the game who would appreciate the lengths we went through to offer the re-release and bonus content. They are named "bonus tracks" because they have no other official name!"
↑ Cut or uncut? - last accessed on 2022-01-25
↑ Catalina 64-bit Compatibility - Google Docs - last accessed on 5 May 2023

[gamedir-7] 1.0 ^1.1 When running this game without elevated privileges (Run as administrator option), write operations against a location below %PROGRAMFILES%, %PROGRAMDATA%, or %WINDIR% might be redirected to %LOCALAPPDATA%\VirtualStore on Windows Vista and later (more details).

[press_release-1] 1.0 ^1.1 MGM Interactive press release: I Have No Mouth, and I Must Scream

[2] Release: I Have No Mouth and I Must Scream - GOG.com - last accessed on May 2023

[release_date-3] 3.0 ^3.1 News - Now Available - I Have No Mouth, and I Must Scream

[4] Changelog:, page 1, post 6 - Forum - GOG.com - last accessed on May 2023

[5] I Have No Mouth, and I Must Scream · AppID: 245390 · Steam Database - last accessed on 9 June 2023

[6] Enhanced Soundtrack in IHNMAIMS: How-To - ScummVM :: Forums (quoting Stephen Kick) - last accessed on 2019-10-02
"The story behind the bonus OST is really interesting, when we started the development of the re-release of IHNMAIMS we learned from Harlan Ellison that the guy who created the soundtrack is none other than John Ottman who became an award winning composer for Hollywood movies including the most recent XMen movie. We were able to contact his agent and ask him about the soundtrack. Luckily he still had the original Data tapes from his sessions in a storage locker. He paid to have them found and digitized and then finally sent to us so that we could include them with the game. Pretty freaking amazing if you ask me. Not only are they of much higher quality but they also included the 21 additional tracks which never made it into the game. We decided to include them because we thought they would provide some really fascinating content for fans of the game who would appreciate the lengths we went through to offer the re-release and bonus content. They are named "bonus tracks" because they have no other official name!"

[8] Cut or uncut? - last accessed on 2022-01-25

[9] Catalina 64-bit Compatibility - Google Docs - last accessed on 5 May 2023

[1]

[2]

[3]

[4]

[5]

[6]

[Note 1]

[7]

[8]

Developers

	The Dreamers Guild
	Cyberdreams
Publishers
Original	Cyberdreams
Current	Night Dive Studios
Engines
Original	SAGA
Re-release	ScummVM
Release dates
DOS	November 17, 1995^[1]
Mac OS (Classic)	1996^[1]
Windows (ScummVM)	September 5, 2013^[2]
macOS (OS X) (ScummVM)	October 17, 2013^[3]
Linux (ScummVM)	October 17, 2013^[3]
Taxonomy
Monetization	One-time game purchase
Modes	Singleplayer
Pacing	Real-time
Perspectives	Cinematic camera
Controls	Point and select
Genres	Adventure
Art styles	Stylized
Themes	Horror