The original Portal 2 castle map is up on Thingiverse for anybody who wants to print one in 3d.
http://www.thingiverse.com/thing:1968711

I also got that error.

I tried it out and it downloads for me and plays, if it's still not working, try my Hammer the Grass Castle Test 2, which is this castle retextured.

"An error occured while downloading this map!"
Mevious and Zogor experienced this before. The problem relates to some maps released in 2012. Reuploading fixed the issue.

I've created a cooperative version of this chamber, have fun.

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=90312474

Thanks, I didn't think of the turrets as being ogres and dragons, If I could figure out how to give them different outfits in the Hammer world editor, I'd be trying that. :)
But to give you an example of how my modifiying of a Portal 2 level is going, I started with a normal Chell and now some how I've got a Chell with a moustache?? Also I've lost the portal gun somewhere in the castle, this wasn't intended, it just happened one day, perhaps thats why Chell has a moustache, perhaps I could make it portal, dunno what I'm doing...

This was AWESOMELY AWESOME!!! My suggestion would be to have the outer walls non-portable so the player (me) has to trek inside the castle through corridors where traps and a legion of battle hardened warriors (turrets) and dragons (turrets) and maybe a few ogres (turrets) hide around every corner. At the very top of the tower is the princess (companion cube) who the hero (me) has to save (plonk its ass on a red button of safety which would open up the exit) A few fizzlers round the place would be awesome to so I can portal the turrets into them so I can hear them go "wawawawawawa" LMAO that cracks me up every time. xD

Ok, based on suggestions, I've created a Storm the castle part 4, basically a Half Life Combine inspired level, evolved from this Castle. Have fun. :)

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=84430940

I kept the gameplay simple to encourage the player to portal around, could add faith plates if players wanted to storm in via jumps, could add another dimension to this chamber. :) Suggestions for improvements always welcome. :)

I like the idea, but the execution is a bit bland. add some faith plates, maybe?

Thanks :)

Nice. I liked it.

Part 3's up, much more tricky for players that like a challenge. :)

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=84109583

Thanks, I'm working on part 3 now as this test has got popular. :)

THIS IS THE BEST TEST EVER

Try "Storm the Castle reverse engineered", I made the part 2 level harder.

I managed without killing one turret..fun but a little easy!

Yay part 2!

As promised, here's the second Storm the Castle test, have fun. :)

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=83619806

Ok just to let fans of this level know, part 2 Storm the castle is work in progress, I'm guessing more of the same but in some way different, so hang fire I'm working on it. This will be as a thankyou for all the great feedback on this map. :)

Thanks :)

This is one of the best chambers I have finished.

Thanks for the comments, nice to see players getting fun out of the castle. Can't make any promises for a better version as I usually add too much stuff and then the map won't build. I'm guessing my main problem with this map is I started with a giant cube and chopped away to make a castle, did take a lot of time.

that was the best chamber ever thanks for your time making it it waas awesome i need more so can you please make more bye

Yea i say it was the best map ever so far one of my favorites thanks for taking your time through making this level! :D

Thanks, always nice to get some feedback. :)

Yeah, one of the best maps i´ve played, to me it was pure fun. Thanks for that :)

Thanks, I tried to make it harder, but then I couldn't complete it during chamber testing, my other version would be better for Co-Op play as somebody needs to act like cannon fodder!

almost beat it but i died :( i had 1 more cube left Good level though great job!