i am not 100% sure but i thing you should go and download them from the runescape website download one
Dreamfall: The Longest Journey. Doom3. F.E.A.R. F.E.A.R. Extraction Point. Quake 4
A good place to start looking would be eBay.
it is next to downtown
just take the highway next to the marina storehouse
soon it will say industrial zone
You have to defeat the two smaller hydras first, then you follow the directions on the game screen after wearing the main hydra down.