On the British old school RPG Heroes and some homegrown games:
The book itself is typed and mimeographed or photocopied, staple-bound with some awful art. The whole thing - production, erratic rules, bad art - reminds me very much of Arduin Grimoire, and it's obvious that the thing was a labour of love. And I've kept my copy for very many years.... Eventually we came up with a game we called Mazes. As far as I know, this was an original development by us. You drew a maze and someone had to navigate their way through it. Then we added traps. Then an item you could pick up to avoid a trap - you could get past the fire if you had a fire extinguisher, for example. Then monsters: we used Daleks. If you'd found the machine gun, you could kill the Dalek before it got you, and your exploration continued.