What random/lesser known game did you spend countless hours on as a kid, either through lack of options or pure enjoyment?

The GBA Monster House movie was such a deep game with an insane amount of secrets and easter eggs for a movie game. Blew my mind that a GBA game could have another game inside it as well to unlock the best watergun in the game.

Also ruined my PSP’s buttons playing Dj Max Black Square.

No Diablo game has also given me the same enjoyment as playing the Return of the King on GBA.

I guess I really did have a thing for movie games.