useta could beat Contra in about 15 mins

Jet Set Willy: The Final Frontier 17hr 12mins

Resident Evil: Director's Cut: 1hr 33mins

Gun: 16hr 47mins

Darkwatch: 3hr 54mins

Perhaps I have too much time on my hands?

Spiderman 2 in a little less than 3 hours. That's the most recent I remember because when I was young I didn't care about time. I'm sure I beat a Mega Man game or two in less than an hour.

king kong 2 hours 38 mins