If you are looking for the original 1997 MS-DOS version specifically for emulation (e.g., via DOSBox), it is hosted on historical archives like Internet Archive as "abandonware". However, these versions often require significant manual configuration to run smoothly compared to the modern Steam or GOG versions. Chasm: The Rift PC Game Review

You can purchase and download the full version of from the following official retailers:

Originally released in 1997 by Action Forms, Chasm: The Rift was frequently compared to Quake due to its dark atmosphere and 3D models. However, it carved out its own niche with a unique , allowing players to shoot off enemy limbs to affect their ability to fight.

: Another legitimate source for the 2022 remaster. Why This Version? (Overview & History)

Dual Core 2Ghz (Intel Core i5 or AMD Ryzen 5 recommended for 4K). Memory: 4 GB RAM.

: Offers a DRM-free version of the game, often praised by reviewers on GOG.com for its ease of use on Windows 10 and 11.

The story follows a commando (the player) tasked with stopping "Timestrikers"—mutants from other dimensions who have created rifts in time. The game spans multiple historical eras, including: Present Day: Power plants and military bases. Ancient Egypt: Labyrinthine tombs and deserts. Medieval Europe: Castles and knights. Modern PC System Requirements

DirectX 11 compatible (GeForce GTX 950 or Radeon R7 370 for 4K). Storage: 2 GB available space. Legacy and Abandonware