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Atari Black Friday
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Chasm: The Rift is a 3D first-person shooter. As a Marine, the player has been sent inside a power plant to investigate the loss of power at the plant. They later discover that a group of monsters known as the Timestrikers are using the power to create ruptures in time that allow them to invade the Earth in three different time periods: present day, ancient Egypt, and medieval times. Timestrikers that have invaded the present day are also taking control of a nuclear plant in order to detonate a nuke that will destroy nearly all life on Earth.

The game starts in the present day, as the player goes inside the power plant and nuclear plant, battling strange-looking security guards and security systems that have gone haywire. They will then find the rifts that the Timestrikers are using to invade other time periods, eventually winding up at the Timestrikers' military base in the distant future.

The 2022 Windows release is not a remaster but built up completely from the ground, using reverse engineering and by-sight recreation, as the original source code is lost. In addition it includes a custom tailored DOSBox port of the original game. This release also incorporates the official add-on originally released as a patch on the developer's website. The add-on can be played both in the new version and the DOSBox version.


Chasm: The Rift DOS Grab that access card
Chasm: The Rift DOS Auto-mapping became rare in Quake era...
Chasm: The Rift Windows The first interactive scene of the game
Chasm: The Rift Windows Under attack in a corridor

Promo Images

Chasm: The Rift Other In-game ammo pack model
Chasm: The Rift Other In-game monster model (level pack)
Chasm: The Rift Other In-game monster model
Chasm: The Rift Screenshot


Alternate Titles

  • "Tron: The Hammer of War" -- initial working title
  • "The Chasm - Entering the Shadow Zone" -- 1995 newsgroup announcement
  • "Chasm: The Shadow Zone" -- 1996 demo name
  • "カズム" -- Japanese spelling

Part of the Following Groups

User Reviews

Overall a great game DOS mind flayer (3)

Critic Reviews

Svenska PC Gamer DOS Dec, 1997 85 out of 100 85
Gameplay (Benelux) DOS Dec 01, 1997 84 out of 100 84
Electric Games DOS 1997 81 out of 100 81
Mega Score DOS Feb, 1998 80 out of 100 80
PC Games (Germany) DOS Nov, 1997 72 out of 100 72
Power Play DOS Nov, 1997 72 out of 100 72
Adrenaline Vault, The (AVault) DOS Oct 29, 1997 3.5 Stars3.5 Stars3.5 Stars3.5 Stars3.5 Stars 70
PC Joker DOS Nov, 1997 70 out of 100 70
GameSpot DOS Dec 05, 1997 6.1 out of 10 61
Shooterplanet DOS May 25, 2006 25 out of 100 25


Topic # Posts Last Post
Corrections 3 Cantillon (56077)
Apr 06, 2022
Official website (archive.org copy) 1 MrFlibble (17265)
Apr 20, 2013


German index

On September 30, 1998, Chasm: The Rift was put on the infamous German index by the BPjS. More information about this topic can be found in the game group. German version There was a censored German version with green blood. They simply altered the game's color table to turn everything that was red into green. The introduction sequence with the mission assignment was also missing for unexplainable reasons.


The game originally shipped without a multiplayer mode, and with some fairly serious bugs (inconsistent mouse sensitivity and a DOS timer bug). These bugs were fixed in a patch released shortly after the game shipped.

It has been criticized by users and press alike for not having a multiplayer mode, which was pretty much a necessity in first-person shooters by the time the game was released. In response to this, the developers released two patches in early 1998 that added multiplayer functionality to the game. One patch added Internet play, while the other added TCP/IP play for Windows 95 users. A new demo for the game was also released, which included the multiplayer mode and a more accurate representation of the retail game than the previous demo that was released in late 1996.

Ending [SPOILER!]

The hero must venture deep inside of a giant monster, and destroy it from the inside-out... not too different from how the arch-enemy of Quake, Shub-Niggurath is defeated.

Level maps

While the game features a 3D environment, the game level maps are limited to 2D (compare: Doom).

Information also contributed by Spartan_234, Sven Larsen and Xoleras

Related Web Sites

Contributed to by Spartan_234 (460) and BOIADEIRO ERRANTE (87939)
atari mania