If you grew up in the 8 and 16-bit eras then you'll no doubt be familiar with the concept of writing down notes and drawing maps to help you beat tricky games.
In the days before the internet and readily-available guidebooks, players had to make their own luck - and that usually involved putting pen to paper and creating your very own game-busting tips guide.
Artist Philip Summers has attempted to reclaim this lost art with a hand-drawn guide to Konami's classic NES title, Contra. The guide features tips, maps and much more besides, and has been created entirely by hand.
It's available from today on Gumroad; you can download it for free or pay whatever you think is appropriate. Just remember that this guide could save your life one day, soldier.