But you also have to note that not all the Tower Defense games have good graphics or good gameplay.
There are a few TD games which may stand out with brilliant graphics, such as Radiant Defense, Tower Raiders 3, Anomaly Korea and Warzone Earth.
Now Com2US may be joining that list with their upcoming game, Defense Technica.
The game will have some unique features such as Path Rotation and Tower Cards. While the cards system sounds similar to the one they use in 9 Innings Baseball Series, the Path Rotation would be interesting as it would add to the replayabilility of the game.
Path Rotation & Tower Building
Build towers in strategic places to defend against incoming enemies, and rotate paths.
Upgrade towers to increase striking power against the waves of incoming enemies.
Defeat enemies to receive a variety of resources to upgrade your tower.
Collect & Combine Tower Cards
Use the special upgrade card system to create your own unique cards and upgrades.
Sell or combine unwanted cards to get new cards.
Ether Repair & Attack Items
Later stages and waves have stronger enemies and continuous attacks.
Use Ether items to annihilate enemies and to repair your core.
Here is the official trailer for Defense Technica
The Android version does not have a release date yet, but they say it is coming soon.