The design followed the same concept as the Tiger I, but was intended to be even more formidable. The Tiger II combined the thick armor of the Tiger I with the sloped armor of the Panther. The tank weighed 68.5 (early turret) to 69.8 (production turret) metric tons, was protected by 150 to 180 mm of frontal armor, and was armed with the 88 mm KwK 43 L/71 gun. The very heavy armor and powerful long-range gun gave the Tiger II the advantage against virtually all opposing Allied and Soviet tanks. This was especially true on the Western Front, where the British and U.S. forces had almost no heavy tanks to oppose it. The M4 Sherman was unable to penetrate the front even at point blank range and the M26 Pershing and IS-2 had to come within 1300 m and 200 m respectively. The chassis was also the basis for the Jagdtiger turretless tank destroyer.

The Strongest & Most Expensive
The German King Tiger Tank is unquestionably the strongest regiment in the game, but as it was in real life, it is also the most expensive to research, deploy, and support.
 
Considering Germany has the weakest economy, it's usually a good idea to deploy at least a division of heavy tanks first, and save king tigers for the late-game.
 
While the Tiger Tank has the highest health, attack, range, and defense values, it also is the slowest unit in the game. Keep your Tigers in supply and spread-out to protect against artillery bombardment and special-op bombs.
 

Artillery Support
While the King Tiger Tank regiment can certainly do well on it's own, it will perform much better if supported by artillery. Try deploying a division of "arties" to support your "Tigers", or team up with an ally.