"Space War" Game .. what is that

clicky?

steam://install/480

It was used as a development tool, but now some people use it to pirate games.

Its not the only hidden game out there. you can find a few here and there. Like this:

http://steamcommunity.com/app/92

I remember when we used to play Space War in the video arcade. It's a blast to play, especially with extra-strong gravity. )

lol. Someone needs to compile a list of these hidden game urls. :)