[joeconway]

I have been trying to find a game just like this from the mid 2000s for years now. I think it was called something like Qwyzle? I recall the format of the game being identical to this, of individual html pages and there were Facebook groups of working out of the 100 clues.

I recall GEB (Gödel Escher Bach) playing a key part in a lot of the puzzles?

A big part of my early internet experience sadly lost

[Aurel300]

Maybe you are thinking of zahada? It is as you describe, individual HTML pages solved by typing the correct answer into the address bar. It involved a lot of lateral thinking. Sometimes a bit unfair, but it was great fun trying to work this out over several sessions with a friend!

http://www.mcgov.co.uk/zahada.html

There were also some similar games/clones that never quite hit the spot for me.