The 1.998 version of DeepImmersion for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Games, more precisely Arcade. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free Mac app was originally created by Sferyx Srl.
From the developer:
Deep Immersion is a game app that invites you to immerse into a realistic underwater world. You will swim and dive deep in the ocean around the wrecks of ships, airplanes, ancient ruins, and even a castle to complete the missions. You cannot stay calm for a second because you need to survive in an extremely hostile and difficult environment.
You may want to check out more software for Mac, such as DotBot, Phantasia or Tribbi, which might be related to DeepImmersion.