Chasm: The Rift

This page is for the 1997 first-person shooter. For the unrelated 2018 adventure-platformer, see Chasm.

Key points

Also known as Chasm: The Shadow Zone.^[1]

General information

Availability

Source	DRM	Notes	Keys	OS
Retail
Steam (unavailable)		Planned to release in October 2022.

A demo is available.

Essential improvements

Patches

Patch csmtcpip.exe is the latest version. Place file in the installation folder and run via DOSBox. This patch includes the bonus levels.

PanzerChasm

An open-source reconstruction of the original game engine for modern operating systems.

Supports high resolutions, widescreen, OpenGL rendering, texture filtering, networking and both true and fake perspective modes.

Appears to no longer be in development, as the last version was released on December 3, 2017.

Game data

Configuration file(s) location

System	Location
DOS
Windows
Steam Play (Linux)	<SteamLibrary-folder>/steamapps/compatdata/2061230/pfx/^{[Note 1]}

Save game data location

System	Location
DOS
Windows
Steam Play (Linux)	<SteamLibrary-folder>/steamapps/compatdata/2061230/pfx/^{[Note 1]}

Save game cloud syncing

System	Native	Notes
Steam Cloud

Video

Graphics feature	State	Notes
Widescreen resolution		Use PanzerChasm.
Multi-monitor
Ultra-widescreen		Use PanzerChasm.
4K Ultra HD		Use PanzerChasm.
Field of view (FOV)		Fixed at 85°. Use PanzerChasm for lower/higher values.
Windowed		Use PanzerChasm.
Borderless fullscreen windowed
Anisotropic filtering (AF)
Anti-aliasing (AA)		Use PanzerChasm for up to 16x MSAA.
Vertical sync (Vsync)		For DOSBox use an unofficial build (see the glossary page for other workarounds).
60 FPS
120+ FPS		Capped at 70 FPS.
High dynamic range display (HDR)

Input

Keyboard and mouse	State	Notes
Remapping
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		FX Volume (for sound effects and voices) and CD Volume (for music).
Surround sound
Subtitles
Closed captions
Mute on focus lost		For DOSBox change the `priority` background value in the DOSBox configuration file.

Localizations

Language	UI	Audio	Sub	Notes
English

Issues fixed

Technical Issues

This game must be run under DOSBox. Being a demanding 3D game in software mode only, even modern computers have trouble running the game at acceptable frame rates. DOSBox Staging offers significantly better performace.

Mouse movement may stop working on occasion. Save and restart the game to fix.

Bad Performance

Performance Fix^{[citation needed]}

Patch the game to the latest version (csmtcpip.exe).
Download this fixed .exe file
Replace the PS10.exe in the installation folder with the fixed version

Notes

Without this fix the game crashes if DOSBox is set to Dynamic CPU mode. This patch fixes that issue, allowing the game to run with smoother frame rates, even at higher resolutions.

Music does not loop (DOSBox)

Music Fix^[2]
Download CTRLOOP.exe and place it in the installation folder Configure DOSBox to run `CTRLOOP.exe` before launching the game.

Other information

API

Technical specs	Supported	Notes
DOS video modes	VGA, SVGA, SVGA (VESA)

Executable	32-bit	64-bit	ARM	Notes
Windows
Linux				Requires PanzerChasm.^[3]

System requirements

DOS
	Minimum	Recommended
Operating system (OS)	4.0
Processor (CPU)	Intel 486 DX2-66 66 MHz	Intel Pentium
System memory (RAM)	8 MB	16 MB (Windows 95)
Hard disk drive (HDD)	12 MB
Video card (GPU)		PCI video card

Windows
	Minimum	Recommended
Operating system (OS)	7, 8.1	10, 11
Processor (CPU)	2 GHz Dual Core	Intel Core i5 AMD Ryzen 5
System memory (RAM)	4 GB
Hard disk drive (HDD)	2 GB
Video card (GPU)	DirectX 11 compatible	Nvidia GeForce GTX 950 AMD Radeon R7 370

A 64-bit operating system is required.

Notes

↑ ^1.0 ^1.1
Notes regarding Steam Play (Linux) data:
- File/folder structure within this directory reflects the path(s) listed for Windows and/or Steam game data.
- Games with Steam Cloud support may also store data in ~/.steam/steam/userdata/<user-id>/2061230/.
- Use Wine's registry editor to access any Windows registry paths.
- The app ID (2061230) may differ in some cases.
- Treat backslashes as forward slashes.
- See the glossary page for details on Windows data paths.

References

↑ Chasm: The Rift Demo : Action Forms : Free Download & Streaming : Internet Archive
↑ VOGONS • View topic - Carmageddon music (CD Audio) not working
↑ panzerchasm-0.3-alt2.aarch64.rpm - last accessed on 21 July 2022

[Proton_path_note-2] 1.0 ^1.1 Notes regarding Steam Play (Linux) data:
File/folder structure within this directory reflects the path(s) listed for Windows and/or Steam game data.
Games with Steam Cloud support may also store data in ~/.steam/steam/userdata/<user-id>/2061230/.
Use Wine's registry editor to access any Windows registry paths.
The app ID (2061230) may differ in some cases.
Treat backslashes as forward slashes.
See the glossary page for details on Windows data paths.

[2] File/folder structure within this directory reflects the path(s) listed for Windows and/or Steam game data.

[3] Games with Steam Cloud support may also store data in ~/.steam/steam/userdata/<user-id>/2061230/.

[4] Use Wine's registry editor to access any Windows registry paths.

[5] The app ID (2061230) may differ in some cases.

[6] Treat backslashes as forward slashes.

[7] See the glossary page for details on Windows data paths.

[1] Chasm: The Rift Demo : Action Forms : Free Download & Streaming : Internet Archive

[3] VOGONS • View topic - Carmageddon music (CD Audio) not working

[4] zerchasm-0.3-alt2.aarch64.rpm - last accessed on 21 July 2022

[1]

[Note 1]

[2]

[3]

Developers

	Action Forms
Windows	General Arcade
Publishers
Retail	GT Interactive
Retail	Megamedia Corp
Digital	SNEG
Release dates
DOS	October 24, 1997
Windows	October 2022
Taxonomy
Monetization	One-time game purchase
Modes	Singleplayer
Pacing	Real-time
Perspectives	First-person
Controls	Direct control
Genres	Action, FPS, Shooter
Themes	Sci-fi