Oh so many hours me and my brothers have spent on this game... I've lost full weekends on this game, me and my brothers never had a memory card to our PlayStation, so we had to play the whole game without turning off the game, and this is quite a big game, to finish the story back when I was a kid it could take a whole weekend without beating it, my latest run I think took 7-8h (haven't played it for over a year so don't really remember) This was the first game ever on the PlayStation to not only feature the analog dualshock controller, but to require it!
So what is the story? You play as Spike, a teenager who's friend with a crazy professor who have built a time machine, but something goes terribly wrong, not only did he make a time machine, he also built a helmet that enhances your intelligence and an evil monkey gets the helmet, and through the power of time the monkey takes over the world, your mission is to catch the intelligent monkeys throughout the eras and take down the headmonkey Spectre.
I advice everyone who have a PlayStation to go to Ebay and find a copy, because this game is truly amazing! (psst, you can emulate the original PlayStation as well)