The 1.0.1 version of TUG 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 Mac application was originally developed by Mutiny. The application lies within Games, more precisely Action.
From the developer:
Answer the all-important question, are you hardcore or are you weaksauce? Test your mettle and find your answer with TUG: A Space Trucker's Odyssey, the Hardest Action Game You Will Play This Year (no, seriously).
Mutiny Games presents TUG, a top-down space actioner that combines the gameplay of the old-school shoot-em-ups (or shmups, as the cool kids call them) with the strategy of tower defense.
You may want to check out more Mac applications, such as FotoMagico, Doodle Car or FotoMagico Pro, which might be related to TUG.