I’ve done this many, many times. I buy games all the time just to ‘complete my collection’. Whether or not I actually play the game depends on how much I like the first five minutes of gameplay. If it doesn’t grab in 5 minutes, I usually set it aside.
Now, before any of you start thinking I’m a rich nut, I only do this with games that have hit the bargain bin. If I’m not looking forward to a game a lot, or it hasn’t gotten really good reviews, or has a really good demo, I don’t buy it. But even games I’m not interested in, I buy when they hit the bargain bin. I usually can’t resist them if they’re in the $1-$5 range. I just think, “why not?” Instead of eating at a fast food place, I buy some Ramen noodles instead that week, and presto, I’ve made that money back already.
More recently, I’ve started doing this with virtual bargain bins too. Specifically, deals on Gogamer.com. I can’t resist a game that had good reviews, even if I wasn’t particularly interested in it. Games like Brothers in Arms. I know I’ll eventually install it and try it out, but I have no desire to right now, and maybe the mood will never hit me. But I got it really cheap, so I’m not that concerned.
Same with games like Armed and Dangerous. I got it from Gogamer about a year ago for about $3. I don’t know whether its any good but I’m a HUUUUUGE fan of Giants: Citizen kabuto, and I believe this game was by the same studio, so I usually make purchases based on that too. Because I’m a fan of the studio, I know I’ll give Armed and Dangerous 5 minutes one of these days. A chance to grab me, maybe make me laugh like Citizen Kabuto did. If not, eh, I’ll set it aside. But it’s part of my collection, and I like it that way.
I also have Quake 3, even though I absolutely hated what little I played of it. I thought Unreal Tournmant was better than Q3 in every way.
But if I hear about a fan-made mod for Quake 3 that’s worth playing, and is single player (lately I only play multiplayer over Xbox Live anymore, I’ve stopped playing PC games onlline, except with my friends, who all have Xbox 360s), then I’ll install Quake 3 again and install the single player mod to check it out. It might never happen, but I like knowing that I’m prepared if it ever does.