Valve has released a version of its in-home streaming solution, Steam Link, for Raspbian Stretch running on Raspberry Pi 3 and 3 B+. Though, it's a beta release, so there might be a few kinks.
In-home streaming RSS
Valve has officially launched Steam In-Home Streaming, allowing users of its Steam service to stream games to other computers on a home network - even to low-end and home theater PCs.