1) Go to your map on Workshop.

2) Take the number in your address bar after "&id=", convert it to hexadecimal (with i.e. Windows Calculator) and save it somewhere: you need it later.

3) Subscribe to your map, let Portal 2 download it.

4) Locate the .bsp file of your map in steamapps/common/portal 2/portal2/maps/workshop/.

5) Take a note of the number from the .bsp file: you need it later.

6) Create a new map in Portal 2.

7) Locate this map (.p2c file) in steamapps/common/portal 2/portal2/puzzles/<STEAM ID?>/.

8) Change its filename to the same filename as in step 5.

9) Open this file in Notepad++ or another text editor (Windows Notepad will not work correctly).

10) Search for "FileID" and change its value to the hexadecimal value you got in step 2 (please be aware that the value has to be prepended with "0x" and a bunch of "0"s until it has a total text length of 18 characters (including the "0x")).

11) OPTIONAL: Search for "Timestamp_Created" and change its value to the hexadecimal value of the number you got in step 5 (with the same warning as above).

12) OPTIONAL: Change the title and description as well, although I believe you can do this in the Portal 2 editor too.


After you've done this, Portal 2 should recognize that the map is "uploaded" to the Workshop (but edited, note the "*") and will give you statistics and such. If this happens, you know that it worked! Congratulations! Now you can recreate all your puzzles.

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