"Home gamer" is slang for anyone operating on their own at home (even if just in evenings or weekends), as opposed to work done at a company.

They take pictures with their Game Boy Camera: https://en.wikipedia.org/wiki/Game_Boy_Camera

And print them out with their Game Boy Printer: https://en.wikipedia.org/wiki/Game_Boy_Printer

Demo: https://www.youtube.com/watch?v=1z2_af1vfJM

Not all games are played on the computer.....

print key guides, maps, cheatsheets