Command and Conquer: Tiberian Sun on Linux for free

Instructions
You may or may not be aware that EA Games have released C&C, C&C Red Alert and Tiberian Sun as freeware.

This will show you the quickest and easiest way to play a fully patched Tiberian Sun with IP networking enabled to allow you to play LAN games with others even without the old IPX networking components configured (basically anything later than Windows XP I think).
 *Note: You must install wine in order for the instructions below.  On debian based distros this is as simple as typing in:

sudo apt-get install wine

Install Wine to play Tiberian Sun in Linux

You should then be prompted firstly for your password and secondly a Y/N prompt - naturally you will want to press Y and wine will be downloaded and installed as above.

Step 1.
Go to this cnc-comm.com this is an amazing site that has all of the downloads you could ever need for Command and Conquer as well as hosting some awesome mods/map editors etc.
More specifically for Tiberian Sun goto the TS: Download page then click the rather small Download button to start the download.

Step 2.
 Once the TSInstaller.exe has downloaded run it - hopefully Wine is the default application for .exe files so you should be able to double click on it.  Otherwise open a terminal and cd to your Downloads directory and run

wine TSInstall.exe

Setup C&C Tiberian Sun using Wine

Either way you will end up with the Tiberian sun installer running.  I would choose the default options for everything except to remove the LAN patch if playing online and skip downloading movies unless you are going to play offline.

Step 3.
Run the game! (it should be in your gnome menu under "other")