It's a fan game.
Check the description.

whoops i ruined all the fun

Look at the description of this. It states right at the bottom it's a fan game.

It doesn't even look like it has the gameplay of a proper retail Sonic game. Looks fairly good for a fan game though.

I would've minded the fact that they get TF2 when they can pay just 49p for a Sticky Launcher over here for a premium account.
Then I remembered that I've got 500+ hours before it went F2P.

Is Steam really such a hard concept for some people?
You download a client and download the games from there.
That's all there is to it. You don't even have to download updates manually.

Half-Life 2 is definetely superior. Half-Life 1 is good for the mods and I guess it's a good game too. Half-Life: Source just isn't worth it if you're debating whether to get HL:S or HL1. And I have to agree that your spelling is incomprehensible at times. And nobody honestly cares what sex you are ...