Definitely very low. I went through a phase in the PS1 and PS2 era where I hardly finished anytihng. I got a little better at finishing games this generation thanks to achievements and trophies, but then games starting getting great sales on Steam (etc..) and lower prices games on PSN and XBLA grew my backlog to epic proportions. Plus I put hundreds of hours into strategy games like Crusader Kings 2, Civilization 5, and MMO's like WoW.
I've played most of them, but it's only been the last few years that I've really focused on finishing games.
Finished 18 last year and 24 this year so far, I'm going for 52 which was my new year's resolution, I'm falling off pace a bit now due to the summer and spending more time outdoors but I still think I can do it.
OK, if I were to tally up all the games I've ever owned versus all the ones I've beaten, I couldn't tell you. I have sold/lost many games over the years, sadly, and I don't know that number. I do, however, have a document somewhere that has all of the games that I currently own in it. It needs some updating but I might track it down and work on it. It's definitely nowhere near half but it probably is more than four. Probably. It might actually be just four.
Id say around 30-40% for me, steam has made it easy to buy something to piss with for a few hours and then put it on the back burner. But i also go back and play a lot of random stuff so its hard to say. I feel like i get my moneys worth, and that's all that matters. Also, lots of games cant be beat like 4X and RTS games.... they sorta live forever.
Of my physical games I've probably completed about 80%, but I usually buy every old game that I have any interest in because I'm afraid it will become hard to find if I wait too long, so (aside from Kingdoms of Amalur Reckoning) that entire 20% incomplete is all older stuff from previous generations. If we're counting digital stuff too, it's probably more like 30% I buy every humble bundle to support them and almost never find the time to play any of the games.
I tend not to buy games if I don't think I'll play them to their natural end. Though I've started to amass somewhat of a backlog due to severe time constraints, so I guess between 75% and 95%? They're games I'll finish eventually though.
There's only a small handful of games I've owned that I decisively abandoned.
Somewhere in the 90's. I used to be pretty determined to beat all games I played, but in the last two or three years I have gotten better at abandoning games if I am not enjoying them... mostly letting go of achievements helped.
I'm pretty bad at finishing smaller indie games I have gotten in sales on Steam.
Man, this poll has me thinking about my pile of shame. It isn't so much that games are too long, because even a game considered short by most people seems to take me twice as long to finish (I think I'm kinda like Vinny, where I try to collect/do everything). Lately, getting to purchase games at a really cheap price and getting to play it for a few before deciding I'll come back to it has become a trend of mine.
Maybe someday, I'll get through that pile of shame of mine. Maybe.
15% or less... i have a lot of games. I try to complete most of them, but i am not under the impression that i actually do. I do however keep a list of all the games i play each year, so i guess i should really just go over that to figure this out instead of just guessing.
I complete games I enjoy, but often this doesn't show via achievements or anything else... I think I've 'completed' 15 games on steam via getting 'all' their achievements. I feel like I complete 60-80% of games I play but it's prolly actually a bit lower since I've bought more games this year than any other year of my life. I don't own all of the games, but I think I recently moved past 250+ games on steam alone. Almost 95% or more of the games on sale right now during the summer sale are already owned by me :S The rest are euro truck sim haha.
Does "collection" mean all games you own, period?
If so, counting all the way back to my Odyssey games from the mid 70s up to today's games and digital libraries, I guess I have about . . . 2,500 games. I have probably beat about 100. Figure of those 2,500 games, 100 are multiplayer/ongoing (not beatable type games) and I guess I have completed about . . .4% of the games I own... of course, I have also only *played* even for a few minutes about 10% of the games I own.
Yeah, it is a sickness.
Well thanks to bundles on Steam and other places I tend to own a lot of games that I never intend on even playing, much less beating, so I would say no more than 10%. I also bought a ton of Xbox and PS2 games when most stores were selling them off for a couple of dollars earlier this generation so there are a fair number of those I've never beaten.