It's been a loong time. How have you been? I'm sure we can put aside our differences. For Science. You monster.
About this creation
I know, there's no Chell, or turrets, or portals, just a door with panels leading up to it. This was more of a test (no pun intended) to see panels in action. Test completed rate, or not (just beware of the nurotoxin if you don't)