Recommend me a game collection tracking service!

[ruffy37]

I'm looking for something like this myself. it need a feature to toggle completed games and a huge database.
I use
http://www.myepisodes.com/
for series and
https://www.icheckmovies.com/
for movies. but found nothing comparable for games. most sites doesn't have a database at all and you need to write down the title yourself.