Marathon

Marathon is an FPS that was originally released in 1994, first for the Macintosh operating system and later for Windows. This game was developed by Bungie -the creators of the Halo and Destiny series- and offers a game experience that's very similar to those titles. Bungie released the code for Marathon 2 In 1999, which lead to the development of Aleph One, an open-source game engine capable o...