Here's a game that I enjoy playing.

Counter-strike source is an FPS... Or first person shooter, for those of you who don't know. People call it CSS For short, and there's a big chance you've heard of it before.

There are many great mods out on servers as well, (my favourite is Surf) the game is easy to play, easy to learn and you'll pick up in no time.. There are two teams, CT (Counter-terrorists) And T's (Terrorists). The game doesn't cost much at all, buy it from a local store, or go and download steam and buy it with a credit card.
There are thousands of servers and many people from all over the world play it.
Beginners Tips:
Go into your options and enable the editor, accessed by “~”. This will allow you to type in very useful commands.
cl_crosshairscale this will reduce your crosshair to the selected size, the bigger the number, the smaller the crosshair. It is very useful. There's a shit-load of commands out there and if you want to know 'em, Google
is your friend.
Learn to use footsteps, Use your speakers the right way around, and you can hear enemies approaching.
Sneak, Remember that other players also hear your footsteps.
Surfing is a very cool map-type, on filters type in "Surf_" in the "map" box, and it,ll bring up all the surf maps... surf is good to learn and there are many tutorials on You tube.
For using a scout, if you want you can try to put a piece of blue-tack in the middle of your crosshair, that way you can no-scope things at close range.
Counter-strike is worth the money you pay for it, it's an awesome game.
Some Cool and or useful Sites:
Well, here you can get a crap-load of stuff for any of the Counter-strike games, including but not limited to.. Skins, sprays, maps, tutorials, forums for help, useful tools, and sounds! There are some VERY skilled artists working on custom weapon skins here as well, good stuff.
Go here to purchase Counter-strike or Counter-strike Source, and download steam. It's also a portal to valve's main website.
Hacks for counter-strike or counter-strike source, not recommended, but whatever floats your boat, right?
Another hacking website, this one goes out to a very large collection of games, including counter-strike source. This website has forums as well.