A twist on the prior thread of favorite game ever. What about a game that you really love, yet have never beaten it? Or maybe you only beat it with cheat codes / save state emulator / etc. Without derailing the topic about what does it mean to "beat a game", we'll play the the honor system here and you guys know what I mean.
It's probably Mike Tyson's Punch-Out!! for me. I didn't own it as a kid, only got to borrow it from a friend. So much fun to play casually. As an adult I know I made it to Tyson but don't recall ever beating him. And I think that would be a memory worthy event so I recognize I probably never did. And that's a top 5 NES game for me, no doubt.
Another one, from the collector perspective is maybe Resident Evil 1 / 2. I like collecting those games but never beat one until RE4 on Gamecube. But that was because I never owned a PS1 as a kid, and only casually played them at a friend's house. I'm not a big horror guy either, so while I like them as a collector, they aren't games I've beaten.
What about you?