I’ve quickly put together a Steam Link package for info-beamer hosted. It fully works in my local tests: I can play games running on a Windows Desktop seamlessly on my info-beamer powered Raspberry Pi using an XBox controller. An Ethernet connection is recommended due to the video bandwidth.
You can try out the package here:
Right now you’ll have to use the testing version of the info-beamer OS. Otherwise it most likely won’t work. See Trying out the next info-beamer OS version before release to learn how to upgrade your Pi.