what is the absolute best game to challenge the brain?

I would like a large- file game which is challeging & interesting. Anyone there who can let me know?

I loved the game "Return to Mysterious Island"! Is there another game like it out there?

There's not too many these days unless you go for the Large File games. BF member EdnaMoles is the expert on LF games.

One game I really liked was Azada. Lots of puzzles, but not a LF game.