I have so many that it's hard to pick just one Most of the really bad ones get less than a minute of play before being filed away forever--but this list isn't for those--I don't think. My 'worst' games barely held my attention, and strung me along for a good amount of time while providing no fun at all.
Cladun: This is an RPG on PSP--this one comes right to mind. Lousy "humor" and long cutscenes making fun of how awful the game itself is. I wanted all the main characters to die. I kept playing this for nearly an hour, waiting for it to get better, and praying for savepoints so I wouldn't have to re-live anything I had already endured.
Also Dirty Harry on NES. These days I would just chuck it on a shelf after 15 seconds, but it was an xmas present when I was 10 or so, and I ended up beating that game (many times).
Edited by Reaperman, Thu Jan 12, 2012 11:40 AM.