Command & Conquer 3: Tiberium Wars
Requires C&C 3 v1.04 !
This mod enables walls to be built in the game.
Note that because it is a mod, it will most likely prevent you from playing with anyone who doesn't have the mod.
Also, although this has been extensively tested and works on my machine, I make no guarantees that it will work on yours.
To install this, make a backup copy of the CNC3_english_1.4.SkuDef file in your C&C3 folder. Then unzip the cc3walls.zip file into your C&C3 folder. You should have a modified CNC3_english_1.4.SkuDef file plus a folder called "walls".
To uninstall, remove the "walls" folder and restore the backup copy of the CNC3_english_1.4.SkuDef file.
If you're not comfortable with installing it the manual way, simply run the CnC 3 TW - Wall Mod.exe file.
this are instructions included with mod.