[SP] 12 Angry Tests
It means some files are missing/corrupted; steam will automatically download a couple of files (the ones that were broken/missing) and you should be able to play properly again 
On the map
First map I've downloaded. Brilliant!
Straight up fun, easy, of course, but so enjoyable. The best map pack out there; this is the one I send my friends to when I introduce them to the portal mapping scene.
First post! Registered just to say thanks for this, was the first portal map I've downloaded and I found it thoroughly enjoyable. Good fun, the puzzles were just the right amount of difficulty for a fun evening and pitched at around the main game difficulty. I also enjoyed the fact that it ended with a boss fight, tied the whole thing into a cohesive experience that made it retrospectively more memorable.
My friends haven't really tried maps, I'm the first. Hopefully referring this on will be the gateway for me to drag others along with me in trying out the rest of the maps made by the Community. Thanks again.
This is a great map pack.
However in the last room with the boss fight i see no ground under the floor, where the acid should normally be, its just pink / black dots all over.
However in the last room with the boss fight i see no ground under the floor, where the acid should normally be, its just pink / black dots all over.
Put the maps in steamappscommonportal 2portal2_dlc1maps; go to the console in that level and type in rebuildcubemaps. That might solve your problem.
This is a fantastic set of maps. Wide ranging but cohesive with an overall story. Easily the best Portal 2 mod I have played. Thank you for all your time and effort!
Awesome!