Portal: Revolution is a huge, eight-hour mod that bridges the gap between Portal 1 and 2

Portal: Revolution is a huge, eight-hour mod that adds 40 new test chambers to Portal 2, bridging the gap with its predecessor with full voice acting.

www.rockpapershotgun.com

The 8 hour mod is packed with new and classic mechanics, 40 puzzle chambers, and it's all fully voiced!

Check out the Steam page for a preview or to download it for free.

Portal: Revolution on Steam

The Portal Mod you've been waiting for. Delve into a new story with original characters, spanning over 8 hours of gameplay and featuring over 40 new challenging test chambers which make use of new mechanics.

store.steampowered.com

Seems like it'd make some great streaming content if anyone is looking for ideas!

Nexus Mods has been a great source of mods for me in the past, but are there any (new or old) that you'd recommend?