I'm super unfocused, I tend to start a game, play it for hours in one go, then not go back to it and never finish it.
All of the Bratz games on PS2 xD (I like them, I know they're not good, I just don't care).
Always Sometimes Monsters.
From Dust
Spud!
Spy Fox in Dry Cereal
Spy Fox Operation O-Zone
Little Inferno
Domestic Dog Simulator
I Have No Mouth and I Must Scream
Neverending Nightmares
Machinarium
9 persons 9 hours 9 doors
That is literally it which is terrible considering I own literally thousands of games. I've played the most of the Pokemon games until the credits but that isn't 100% and I've played other games to the end but then they have a bunch of endings so that's also not actually complete. I haven't 100% finished a game in years, partly due to getting distracted, partly because I just don't really play that way, partly because I suck at games to be honest.