Characters

In Ben's quest to thwart Vilgax, he will encounter enemies new and old, such as Psyphon, the Vreedle Brothers, Charmcaster, Darkstar, Ghostfreak (Zs'Skayr), Albedo, and D'Void (Dr. Animo), waiting to get their revenge on our hero. But Ben will also be among friends as Grandpa Max, Professor Paradox, Cooper, Ship, Grandma Verdona, and Azmuth help him to save the earth and the galaxy.

Gameplay

While on their way to the amusement pier Ben, Gwen, and Kevin encounter a Forever Knight through the use of an alien tech tracker. Kevin, Gwen, and Ben track the Forever Knight to the pier where he is looking for a piece of alien tech buried there. On his way to retrieve the component Ben encounters a off world (and notably out of shape) plumber named Gorvan. Gorvan states that his objective is to retrieve several illegal alien tech components and quickly recruits Ben, Gwen, and Kevin to complete this task. Next the trio go to a Forever Knight castle in the forest. Ben and Kevin fights their way through the Knights and the security system where Ben discovers the next component is hidden in a (notably chained) robotic Dragon's den. After defeating the Dragon, Ben retrieves the component and brings it back to the nearest plumbers base where Gorvan is and Gorvan (notably very rudely) takes the Component for safe keeping.

Next the team hunts down a recently uncovered component at a military base. Kevin decides to sit out the mission after being insulted by Ben and Gwen. As Ben makes his way through the surface (fighting Vulkanus pick axe minion's), Gwen deactivates the security systems for him under ground. Eventually Ben makes his way to Vulkanus himself (who takes disappointment in that Kevin decided not to join Ben on his mission) where Ben must fight and defeat him at ammunition range and Ben takes the component. Back at the base after giving Gorvan the component and telling him about Vulkanus Gorvan states that Vulkanus will have to be "dealt" with eventually Kevin Ben and Gwen notes that Gorvan is acting suspicously.

Gorvan receives a message from the rest of the plumbers asking for a progress report and Gorvan goes to delever it on a incryptid channel. Next Ben travels to a hatchery where a group of DNAliens are using the component to power an egg machine. After fighting his way through a ghost town and the Hatchery Ben retrieves the component and brings the component back to the base.

After unlocking Grandpa Max's secret files Ben, Gwen, and Kevin discovers that Gorvan was a disgraced Plumber who was thrown out for hording and selling illegal alien Tech, the revelation provokes Kevin to hunt down Gorvan without backup and Ben goes after Kevin. Meanwhile Kevin has caught up with Gorvan who lured Kevin into a Hatchery inside the base. After finally catching up with Kevin, Ben finds him partially transformed into a DNAlien. After beating Kevin, Ben turns him back to normal and sends him back to Gwen. Ben continues Kevin's short lived quest to find Gorvan and defeats him. After getting back to Gwen and Kevin, Gwen explains that the final component (which was hidden inside the base) is a Sub energy core. A Highbreed breaks in and steals the component.

Using Kevin's tech tracker, they trace the Highbreed to three now completed weather towers. The Team is immediately split up due to a swarm by DNAliens. Ben deduces that a nearby rocket ship is the control center for the weather towers and proceeds to remove it from the circuit board despite Gwen's attempted warnings.

After fighting off a swarm of DNAliens, DNAlien alien hybrids, plus one Highbreed Ben makes his way to the auto pilot where he moves the ship out of the circuitry. However, the Highbreed explains that removing the ship starts the weather towers up and gloats that if not for Ben his plans would be ruined and tosses Ben out of his Ship so that Ben can see his own handwork in action.

We rewind to the beginning of the last level where Gwen tries to warn Ben not to go into the ship. After the failed attempt, Gwen and Kevin split up to take down the tower's force fields. After accomplishing their mission they are met with a full sized Humongosaur who easily takes down the remaining towers. While exploring the wreckage of the towers, the team discovers that the Highbreed are planning to make a giant arch.

Playable Alien Heroes

All Platforms

• Swampfire
• Humongousaur

Wii, PS2, PSP Only

• Big Chill
• Spidermonkey
• Jetray

DS Only

• Goop
• Echo Echo
• Chromastone

Bosses

• Techadon (DS)
• Mech Dragon (Wii, PS2, PSP)
• Vulkanus (Wii, PS2, PSP)
• DNAlien Kevin (Wii, PS2, PSP)
• Gorvan
• DNAlien Wildvine (DS)
• Highbreed Commander

Levels

• Knight-Mare at the Pier
• The Forest Mid-evil
• Bombs Away!
• A Few Bad Eggs
• Plumber Trouble
• Rural Rumble
• Running on Autopilot
• A Change In The Weather

Components

• Pyronite Plasma Oscillator
• Petrosapian Focusing Array
• Water Conditioning System
• Alien Air Conditioner
• Sub-Energy

Ben later finds Vilgax's drones and the Forever Knights fighting. Enoch is building a mech using technology from Area 51 in an attempt to stop Vilgax; and though he is also trying to save the world, he isn't willing to let the Tennysons help. By defeating Enoch's mech, Ben regains Cannonbolt.

In San Francisco, Ben learns that Kevin escaped from the Null Void and brought some plant creatures along. Kevin 11 kidnaps Max and escapes to the Lumber Mill, where Ben defeats him. Kevin 11 is then drawn in the Null Void again. Ben tracks down and defeats the mother plant in Seattle, after which Ben regains Wildvine.

In outer space, Vilgax and Ghostfreak are working together, the latter having released Vilgax from the Null Void. Ben, Gwen, and Max find out about Ghostfreak after defeating an overshadowed Hex. They also learn that he plundered the Plumber's base. Ben fights Ghostfreak at the Coast Theatre, and is then locked in the Null Void by Max. Ben finds another Omnitrix Crystal which unlocks the first part of the Master Control.

Ben finds out about Doctor Animo using the Alien DNA to create a mutant army. Ben fights them, but Doctor Animo manages to kidnap Gwen. After defeating Clancy (who works for Doctor Animo), they receive a hint about Gwen's location. They reach an oil platform, where Ben encounters Doctor Animo. Ben defeats him and saves Gwen. He also regains another Omnitrix crystal, which unlocks the next and last part of the Master control. During her imprisonment, Gwen learned that Doctor Animo works for Vilgax. She also learned that Vilgax wants to draw the entire planet in the Null Void.

Max and Gwen try to warn the government, while Ben deals with Sixsix and Vilgax's troops. Max then makes a space vehicle out of the Rust Bucket. They encounter Vilgax in his own ship. Ben then defeats Vilgax in a battle and ejects him into outer space. After that, Ben, Gwen and Max recover the last pieces of the Omnitrix. The Tennysons escape and the Null Void portal draws Vilgax and his ship inside, injuring his body in the progress. The Tennysons then head back to Earth.

As Vilgax is repaired by his nanobots in the Null Void, he swears that he will return someday. The last area is the Null Void where Ben fights all of his enemies twice. In the final scene, Gwen tells Ben how impressed she is as. Max looks for a way out of the void.