The game is stretched by default on widescreen. You can use the PCGamingWiki guide to modify the code.pak file for an unstretched image.
Watch these walkthroughs to verify your game is running correctly and to see the installation's final result: Terrorist Takedown 3 (2010) Full Game Longplay YouTube 路 Fur FPS Games Terrorist Takedown 3 - FULL GAME walkthrough | Longplay YouTube 路 Global Gaming terrorist-takedown-3-installation-tutorial
Some versions may require replacing the original GAME.EXE in the installation directory with a compatibility fix found in the archive. The game is stretched by default on widescreen
Installing (2010) on modern PC systems involves basic setup followed by essential configuration tweaks for stability and compatibility on Windows 10/11. Minimum System Requirements terrorist-takedown-3-installation-tutorial
1 GB (2 GB recommended for Windows Vista/7/10/11).