Rave!? is a multiplayer arena shooter, armed with laser cannons which shoot a powerful laser that will destroy anything in its path, with diminishing returns, each object the laser goes through lowers the damage the beam does against the enemy teams. the other issue is that the enemy team cant see where you are, the laser takes a half second to charge up, you cannot move while charging but there will be a small glow which the other team can see, so you kind of have to predict where the enemy team is so you can blast em.
you can also detect where people are by hearing their footsteps, or you can even see them if they are moving quickly, not entirely but more a blurriness around where they are.
works best with surround sound or with a decent pair of headphones.
every 10-20 seconds every player in the game will show up on your screen for a second kind of like a wall hack, its random for everyone so everyone doesn't see each other at the same time, it allows you to see where anybody is, and incentivizes everybody to move around instead of camping.
image from:
http://img11.hostingpics.net/pics/281904hl22013012222005595.png