February 9, 2012 3:00 AM | John Polson
David Johnston explains in the above video how each of the different gateways (portals, if you will) function. It's not just Portal, though. Skip to 1:45 to see a "sizable" gameplay difference. By making two gateways of different sizes, you come out differently than the size you were when you went in.
Following that segment in the video, Johnston demonstrates gravity rotation gateways, which basically allow you to walk on walls and ceilings. If you're still not impressed, Johnston continues with temporal gateways, past selves, and frickin' laser beams.
Gateways' official trailer is posted after the jump. Everything happens at a much faster pace; at least now you are somewhat prepared.
The trailer music and Gateways' visuals probably won't win any awards as they are now, but I think the gameplay will be a joy to dive into! Who wants to join the professor?