Tornado Defense (トルネードシュート,Torunēdoshūto?, lit. "Tornado shoot") is a mini-game from the Xbox 360/PlayStation 3 version of Sonic Unleashed, played from Sonic's point of view whilst riding on Tails' Tornado-1. The objective of the level is to fight off enemy aircrafts as they attack the player, similar to Sky Chase. Sonic must fight the boss Egg Cauldron at the end of this level.
At this point in the game, Sonic and Tails must head to Spagonia to meet up with Professor Pickle. It normally wouldn't have been possible to get to the continent, due to the fact that the planet was broken at the time. They decided to take the Tornado on a short flight to their destination. The duo, however, were attacked by Eggman's robot fleet in an attempt to cross the border to Spagonia. It can be played in Rooftop Run.
At a much later point in the game, Sonic and Tails are en route to Eggmanland to restore the last continent. As one might predict, they encountered Eggman's robot fleet once more as they entered the airspace. It can be played in Eggmanland.
Sonic needs to shoot down Eggman's robots and their attacks as they fly towards him through the use of Real-Time Interaction shown on-screen. Pressing the specified button will destroy the highlighted target. Sometimes, the player may need to press multiple buttons in a sequence to destroy a group of enemies at once. If the player simply mashes all of the buttons with disregard, the Tornado will lose energy and be unable to fire any more projectiles for a second or two, leaving Sonic and Tails vulnerable to attack. To quickly recover from this, the player may press and / and in an alternating sequence (That is , , , etc.) The Tornado has a health bar, labelled as Shield that will decrease each time it suffers damage from enemy attacks. If the Shield reaches zero, the player will lose a life and will have to restart the entire act from the beginning. There are three types of enemies;
Regular robots- 1 hit to destroy, adds to score.
Gold robots- 3 hits to destroy, adds extra points.
Blue robots- 1 hit to destroy, raises energy.
This mini-game is skipped entirely in the Wii/PlayStation 2 version of the game.
It is possible to replay the first act in Spagonia's Entrance stage at night by using attacks on switches to unlock a door to a courtyard where there is an act entrance for stage 1.
An achievement called "Ace Pilot" of Sonic Unleashed requires the player to complete the first act of Tornado Defense without taking damage.
As the player's projectile shot is fired against the enemies, the color of the projectile matches the color of the button pressed. As such, the PlayStation 3 and Xbox 360 versions each have different colored projectiles match their respective console controller's button colors.