Halo 5: Forge, a free version of Halo 5's map editing tool is scheduled to be released for Windows 10 on September 8, 2016.
Minimum
CPU: Intel Core i5 at 2.3 Ghz or AMD equivalent
GPU: NVIDIA GeForce 650 Ti
VRAM: 2GB
RAM: 8GB
Recommended (1080p at 60 frames per second)
CPU: Intel Core i5-3570k at 3.4 Ghz or AMD equivalent
GPU: NVIDIA GeForce 970
VRAM: 4GB
RAM: 12GB
Personally I am pumped, I should be able to run it and finally enjoy Halo on PC again. This is the beginning of Halo on PC and Halo 6 and beyond will be releasing on PC (Windows 10+ only) from now on.