The 2.5 version of INMOST 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. We recommend checking the downloaded files with any free antivirus. This software for Mac OS X was originally developed by Hidden Layer Games. The software is categorized as Games.
From the developer:
INMOST is an atmospheric, story-driven puzzle platformer, following three playable characters within one dark, interconnecting story. In an old abandoned castle, you’ll need to explore every nook and cranny, avoid detection, slice your way through enemies and spring deadly traps in order to escape the evil that lurks within.
You may want to check out more software for Mac, such as MicroWar, Bubblegym or A Tack!, which might be related to INMOST.