Are there any games that you artificially shorten? That you pretend are shorter than they actually are? Either because the games get too hard or they just aren't enjoyable past a certain point?

Mine is R-Type. As far as I'm concerned, the game only has four stages. Stage four, the last stage, is a real bitch and the final boss (that large three part ship) is an ass. I find the rest of the game difficult to the point of unplayable. If I can beat stage four, I've won

Does anyone else do this?