From the team that brought you Aleph One, the classic sci-fi FPS Marathon Infinity from Bungie on Mac revived for modern hardware by the fan community.
System Requirements
Minimum:
Requires a 64-bit processor and operating system
OS: Windows 10
Processor: 64-bit Processor
Memory: 4 GB RAM
Storage: 100 MB available space
https://store.steampowered.com/app/2398520/Classic_Marathon_Infinity/