One of the best real-time strategy games of all time, Heroes of Newerth truly deserves to be a part of our list of Best Free Games for Mac users. System Requirements: OS X 10.4 or newer, Intel Processor, 2 GB of RAM, 128MB fully OpenGL 2.0, 10 GB available space. Genre: Action role-playing, Real-time strategy, MOBA Top 3 WeTheGeek’s Recommendation = Top 3 Free Mac Game Apps.