Telika: Around 150 games.
Thing is, I don't like uninstalling games that I haven't finished. I never "abandon" a game, I get "temporarily distracted" by another and still plan to resume it "next" or "very soon". Uninstalling it would make it less likely, it wouldn't be available for impulse launching. I uninstall games that I either have completed or really decided that it doesn't deserve my interest (very very rare) or that I won't be in the mood for it for a very long time.
In a way, uninstalling a non-completed game feels like a bit of a failure. Like, why have I bought it, then, if it doesn't hold my attention to the end ?
It might also be why I have a lot of books with bookmarks on my desk, unlikely to be finished ton but also unlikely to return on the shelves till then..
lukaszthegreat: what is the oldest game you want to come back to but havent done so? as in, when was the last time you played it.
It's hard to tell, through the changes of computers (I don't reinstall all the games that I haven't uninstalled) and the lack of readable dates (I don't track usage with clients). As a kid, I started Ultima IV. Haven't touched it for decades, but I'd be happy to finish it some day (though I doubt I'd have the patience for all these random encounter fights anymore). I'm stuck in some classics due to unsolvable dilemmas (Mass Effect, Arcanum, Star Trek Elite Force) or annoying one-way exits (like Wasteland 2 or Planescape 2 warning me that I'm about to leave an area and not be able to come back and explore it further). There's a few RPG epics like Oblivion that I've left hanging, and some that I completely merged in my memories (can't tell the difference between Dragon Age and NWN2 anymore, left them in 2010), but I don't want to give up on them...
I've started Baldur's Gate upon release. I haven't finished it. I've re-started it and re-abandonned it around 2015 as I lost the laptop I was playing it on, I've retrieved this laptop in 2020 and... well, I guess I can finish that game now... one of these days...?
On my current desktop, I think Far Cry 2 is the one gathering most dust (2012, according to save files). And it feels recent to me. If I restarted my old computer, I'd find uninstalled games that predate it by a large margin.