This is literally the saddest story in my steam library. This awesome game went from hundreds of people playing it during the open beta - every server full, every new server instantly filling - to dead in months. Why? Price. Hyperbol was $20 for most of its lifespan, and while it's still not technically dead, it's still also not $5. This game would have been a tremendous success had it come out as a F2P game (something Steam didn't support back in 2007) but instead the developers were stubborn and steadfast in killing their own game.
There is literally no reason for this to be more than $5 right now. I say that as someone who waited for the pre-purchase to end in 2007 so that I could pay the full price for the game. It was worth $20 then, but now? Well, there's not a single active game to be found, unless you like playing with half-baked AI. Should this ever go on sale for less than $2, I'm buying it for 20 people on my friends list. Take that as you will.