For the most part it is thought that Yaoi/Boy Love games are made by Japanese countries. Yaoi itself is a Japanese term, and while it is true that a lot of well known boy love oriented content hails from Japan, Japan isn't the only place to find good sources of boy x boy romance.
North American Companies
Insert companies here.
Japanese Companies
- Mada Koubou
- Nitro+CHiRAL
- Spray
Korean Companies
Insert Korean companies here.