Download of Helltaker 1.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program lies within Games, more precisely Adventure. The actual developer of this free Mac application is vanripper. 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.
From the developer:
Helltaker is a short game about sharply-dressed demon girls. You traverse hell in search of love, win the hearts of horrible demon girls, kick adorable skeletons around, solve puzzles as efficiently as possible, all while trying not to get murdered by demon girls. However, you get murdered by demon girls anyway.
You may want to check out more software for Mac, such as Mystery Island II, Super Collapse! 3 or Otto Matic, which might be related to Helltaker.