The new Czech game KingdomCome Deliverance is not perfect for Macbook Pro 13" 2015, but on 800x600 or max 1024x768 its playlable, not perfect. I will try to end the game with this settings, i hope you liked this video!

Specs:
Macbook Pro 13" 2015 Retina (Upgraded version)
Processor - 2,9 GHz Intel Core i5
Memory - 8 GB 1867 MHz DDR3
Graphics - Intel Iris Graphics 6100 1536 MB
Storage - 256 GB
Windows 10 Bootcamp