How to Install and Play Popular Game 'True Combat: Elite' on Ubuntu

True Combat Elite (TCE) is total conversion of the popular free multiplayer game Wolfenstein: Enemy Territory. TCE is a tactical-team shooter, set up in a modern-world environment. It puts you into the role of elite mercenary soldier in the conflicts of two internationally operating forces.

Yet another terror counter-terrorism shooter. Should I try it?? Look at some of the features of the game and the gameplay video to decide yourself.

• The game is absolutely free. Both Wolfenstein: Enemy Territory and TCE is free to download.
• Tactical-teamplay oriented, modern-world combat simulation
• Realistic weapon behavior simulation
• Iron sight aiming system, no crosshair
• Sophisticated ballistic simulation including multiple-layer object penetration
• Professional mode: 1-life, short-timed, objective driven scenarios in realistic environments
• Independent minimods: objective, bodycount and capture the flag
• Balanced, team specific set of real-world weapons (Beretta 92, Glock 19, Ump45, Mac-10, M4, Ak-47, and much more)
• Rich, deluxe graphics, based on high-resolution digital-camera shots and HDR lighting
• Lag compensation, client-side bullet prediction, punkbuster support
• Immersive and lethal, fast-paced action

How to install and run it on Ubuntu

WienerWuerstel @ Ubuntu Forums has given simple step by step instructions to install and run it on Ubuntu:

1. Install the package to add PlayDeb PPA from here
2. Run the following commands to install Wolfenstein: Enemy Territory: sudo apt-get update && sudo apt-get install enemy-territory
3. Start Enemy Territory once and create a User
4. Download True Combat Elite 0.49 and the 0.49b Patch 
5. Extract TCE 0.49 and put the Folder "tcetest" in "/home/yourusername/.etwolf
6. Extract the TCE 0.49b Patch and put the Content of the Folder in the "tcetest" Folder
7. Now TCE should be listed as a Mod in Enemy Territory
8. Run the Mod

[Many thanks to  WienerWuerstel]