The amount of people who tuned into the 24/7 Bob Ross marathon on Twitch was fascinating, but perhaps not quite as much as the realisation that soon followed. Bob Ross, as it turns out, is wonderfully compatible with the intense, volatile world of gaming, as Twitch Creative quickly gathered a legion of followers tuning in for a meditative session with some Prussian Blue and Sap Green.

But the spirit of Bob Ross has been living in video games for a long time. And it's perhaps best illustrated in Heaven & Earth, a puzzle game released in 1992 that's since been released as freeware.