Once upon a time there was a website called the Second Life Games Directory, which sadly vanished without a trace. Then there was the Second Life Games blog, which now sees very few updates. There was an in-world Game Ring, which the last time I checked listed 4 locations, and when this list was started even the Second Life Showcase didn't have a games section - although it now does (Sports and Games*).
So you see there is a void. There are many great games within Second Life, all the more special because the communities that play them almost always add value. This site aims to list a few, and maybe someone will find it useful.
Pure role-play sims are not included, which although high-quality are just too numerous to try and list (plus they're easy enough to find already). Nor will 'gaming sites' be included; the most common money games might be added but they won't have an associated SLURL. Also, I won't delete anything. If you find dead links it's because I'm providing an archived record of a game that has now sadly vanished; as well as being to lazy to check them.
Previously I couldn't be bothered to take any input, but that's a very web1.0 attitude. If there are any games that you's like to see added then you can contact me at my gmail address, for which the username is thoughtfulmonkey. I'll try to include SLURLs and websites for all the games, so if you want to actually know what they're like then go and play them.
I occasionally do a bit of small-scale game development work myself, which you can see on my blog, a few of which are included in the list. Hell, why not? If I don't tell you about them then who will.
*More sports than games, but still a handy resource.