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Chasm: The Rift

From PCGamingWiki, the wiki about fixing PC games

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

Chasm: The Rift
Chasm: The Rift cover
Developers
Action Forms
Publishers
GT Interactive
WizardWorks Software
Megamedia Corp
Release dates
DOS October 24, 1997
Chasm: The Rift on HowLongToBeat
Chasm: The Rift on IGDB
Chasm: The Rift on MobyGames
Chasm: The Rift on Wikipedia

Key points

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

Availability

Source DRM Notes Keys OS
Retail
DRM details are not known
DOS
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.

Chasm Portable

A compilation of patches, fixes and improvements to Chasm via Dosbox Staging. Patch csmtcpip.exe is included.
Greatly improves performance, includes official bonus content, level editor and goodies.

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

Save game data location

System Location
DOS

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 or Chasm Portable is recommended for better performance.
Mouse movement may stop working on occasion. Save and restart the game to fix. (This issue has been fixed in Chasm Portable).

Bad Performance

Performance Fix[citation needed]
  1. Patch the game to the latest version (csmtcpip.exe).
  2. Download this fixed .exe file
  3. 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. This fix is included in Chasm Portable.

Music does not loop (DOSBox)

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

Notes

This fix is included in Chasm Portable.

Other information

API

Technical specs Supported Notes
DOS video modes

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


References