Spyro 1: Which I have cmpleted so many times Ican do the entire game under 3 hours to 100%, it was my childhood
Fallout 3: All side quests, bobble heads, expansions, weapons, locations and perk it is possible to get
Guitar hero 3: Every single campaign done, not full 1000 though because of co-op and online achievements which i despise
Disgaea: spent 500 hours on that game, I got so powerful I did 9 billion damage, was the overlord of terror, finished multiple times with every ending, all my weapons on every character had been down the item world to level 100 and I also had a some form of every single person and creature
Resident evil 4: Finished on all difficulties, found every easter egg, finished adas version and had full health by the end too
Finally DMC3: Finished on every difficulty which too about 20 hours, upgraded every weapon to max, had max health and devil mode magic and could remember most weapons specials off the top of my head
...God I just realised how sad I am
EDIT: For grammar and being correct by the video game standard