Thanks, you guys. I still have a couple of more "quests" I can think of, just need to double-check them and write em down here.

Btw, no need for this to be a single player thread, anyone may add quests if they like. To distinguish the quests from normal posts like this one I've written them the following way:

* text body in "Century Gothic" italic font
* heading in the same font size 4 bold
* code in standard "Courier New"

And of course, do let me know if you see any mistakes, omissions etc.