Steam supports some of the games, and with SD Card you can make your ~/.steam folder there, games would be on your SD Card. gog.com also has 9-10 games running

Steam supports some of the games, and with SD Card you can make your ~/.steam folder there, games would be on your SD Card. gog.com also has 9-10 games running, and apart from that many more games are running on the croutonized chromebook. This with debian/sid and chromebook in dev-build.