Adding a non Steam game to Steam - achievements?

[TheBigCheese]

Hi folks

I've just bought Flock! from Gamefly from the princely sum of £1.40, looks really fun but I've just noticed after downloading that there isn't a Steam key (which I assumed there was as it's available on Steam).

Is there any way of adding it to Steam and activating the achievements/multiplayer (this version uses Gamespy) or is that not possible?


Thanks!

 

[TheBigCheese]

Thanks for the reply, what's the difference between Steamworks and Steam titles then?

I've never used the 'add a non-steam game to my library' before, what is that for then?

 

[TheBigCheese]

It didn't come with a key, just a download button in the Gamefly download manager.