kottke.org posts about Portal
A Super Mario Bros version of Portal?! Aug 29 2011
Wow. Someone is making a video game featuring the original Super Mario Bros worlds but Mario is outfitted with a Portal gun. Watch the demo:
More information on the game's development is here.
Yes, this is an actual game being developed - it is not a mod of any existing one. It's coded with L"ove (info at the bottom of the left menu) and will be released for free (so we don't get stabbed by lawyers)
All the source code of the game will be available after release
The game will have mappacks, which will be downloadable from ingame. Users most likely won't be able to publish maps directly, but will be able to send them in and we'll add them for everyone to use.
The primary maps will have a story and some portaly puzzles. What kind, well, we'll figure that out as we go
Level editor will be embedded in the game so you can edit the level while you play
Original SMB levels and Lost levels will be included