I was hoping to share my knowledge on games (among other things) so I thought maybe I could help you fellow LINUX-GAMERS out on patching COMMAND & CONQUER-3: TIBERIUM-WARS on Linux, since most guides on Modding/Patching are done assuming you are on Windows :-(
Just to inform you due to latest patch made by EA (patch-1.09) for RTS-game (AKA Real-Time-Strategy) called "Command & Conquer 3: Tiberium Wars" modified the game balance in favour of Multiplayer & somehow due to their incompetence the single-player campaign got affected in a not-so-balanced way & it remains as such even today since they NEVER bothered to fix it.
The units are not worth what you pay them & are underpowered & the AI cheats; Don't believe me! !??
Well you'll see how much of a brick wall the Sarajevo mission is (the NOD-campaign) among others. I'm talking promoted units out of the bat & that too heroic level (i.e; max-veterancy) also the reduced money recieved from harvesting tiberium.
Pre-1.09 it was 2400 credits for a full-tank of Green-TIberium (& 4800 for Blue-Tiberium) & while, post-1.09 it became 1400 (& 2800 for the blue variety). Also, the Cranes were previously able to build Base-defences, but after the patch can only make Silos, which renders the Cranes useless
So I tried looking for proper well-organized guides to patch it & obviously I found it but the guides were mostly for windows, whereas I couldn't find proper guide or instructions for linux, so I have put together a set of instructions to restore the "ORIGINAL" game balance for my fellow GNU+Linux Gamers out there by piecing together info I found from forumns
RESTORING TIBERIUM WARS ORIGINAL GAME BALANCE (On Linux)
STEPS YOU NEED TO TAKE
DOWNLOAD THE MOD-FILE
LOCATE YOUR GAME-FILES
EXTRACT THE MOD-FILE
SETUP GAME IN STEAM
EXECUTE YOUR MOD
Visit this ModDB-Link to get the Mod-File (made by a Reddit user by the name "Pontifexludaeacus"). You are looking for a compressed file, but I'm sure you already knew that ;-)
Now in case of "Command & Conquer 3: Tiberium Wars" the location of the folder you are looking for is:-
.steam/steam/steamapps/compatdata/24790/pfx/drive_c/users/steamuser/My Documents/Command & Conquer 3 Tiberium Wars
Basically it's in a hidden-folder (denoted by dot in ".steam"). Now you may not see the "My Documents"-Folder outright (IN the "Command & Conquer 3 Tiberium Wars"-Folder).To solve that just play a Skirmish match & SAVE. Now you'll see it appear & along with it a "Replays"-Folder inside it; IGNORE THAT.
NOW, create a new folder in the "My Documents"-Folder & name it "Mods".
& THEN, simply extract the Mod-File there. (But wait we are not finished yet.)
Now in Steam, simply go to the "Properties"-Tab of the game add "-ui" to the "LAUNCH-OPTIONS" bar, basically this LAUNCHES A MENU when you start your game.
Okay so now all you need to do is click "Game Browser" in the new launch menu for the game & select the "Mods"-Tab & click the "CNC3Original" mod option & launch it
& that's all you have to do. Now enjoy the game in it's original glory without running into any metaphorical walls :-D