I have a ton of games on Steam, but I'd say a good 25% of them don't even run on my computer. I just can't pass up a good sale, even if it isn't practical. Luckily, I'll be able to play them later on should I ever decide to upgrade my computer. Other than that, I play games like Borderlands and Team Fortress 2, which actually do run on my computer. My computer isn't even old; it just wasn't built for gaming.