[colecampbell666]

... And any other game using the source engine.
http://www.primotechnology.com/2007/10/17/half-life-2-portal/

[redsniper]

I won't be impressed until I see some kind of multiplayer deathmatch type game with portals.

[haloboy100]

Now that would be crazy. Teleporting people into bottomless pits...

[Fineus]

And when all else fails, tap both fire buttons at once to "divide by zero" as it were and open a nice little suicide black hole, temporarily sucking everything around it in and killing it. The player that opened it dies of course, but then so does every other player in the vicinity.

Sounds like fun!

[CP5670]

That would be a lot of fun, kind of like doing a black shark suicide in Descent 3.

[redsniper]

Just to be clear, I don't mean Portal multiplayer with a bunch of Chell clones running around trying to portal each other into environmental hazards. I mean something like Quake-with-Portals, where you've got the usual array of weaponry AND a portal gun.