Gerald's reputation as the world's greatest scientist led him to becoming the lead scientist for Project: Shadow. However, Gerald could not finish the project on his own, so he contacted the Black Comet and made a deal with the leader of the Black Arms, Black Doom. Doom used his blood to create Shadow the Hedgehog, when Gerald found out their true intentions and developed the Eclipse Cannon. He also made a video of this, which Shadow would later find and use to recover his past and origin, to destroy the Black Comet. Gerald's main reason for being co-operative with Project Shadow is to find a cure for the NIDS, which Maria was victim to. It was going well until G.U.N. came. Maria was killed by Heavy Dog's pilot while helping Shadow escape from them, which drove Gerald insane. He then made the Eclipse Cannon ready to fall and crash into the Earth when all seven Chaos Emeralds were implanted in it. He also made Shadow able to carry out these orders without question and left his diary as the item that would convince Eggman to release Shadow, if someone happens to find it.
The ARK is Gerald's reasearch center, where he created his experiments.
The Biolizard was the prototype of the Ultimate Life Form, but it needed to life support and was sealed away at the Cannon's Core. It was the main reason the colony was shut down.
The Eclipse Cannon was Gerald's ultimate weapon, implanted on the ARK to destroy the Black Comet. However, after he want insane and sunk into grief and madness, he made it so it would crash into the Earth as a megabomb when all the Chaos Emeralds were implanted in it.
The Artificial Chaos were liquid-like creatures that were based on Chaos, but soon after their creation they went beserk and attacked everyone onboard the ARK. Luckily, Shadow and Maria were able to stop them and they became the guardians of the ARK.
- "This is a death senteance for every human being on Earth. If my calculations are correct, the Space Colony ARK will impact the Earth in 27 minutes, 53 seconds." - Gerald's death seantance in Sonic Adventure 2'
- "I plan to give you a taste of my revenge, once all the seven Chaos Emeralds are collected. All of you ungrateful humans, who took everything away from me, will feel my loss and despair!" - Gerald's message in Sonic Adventure 2.
- "No..." - Gerald replying to the soldier asking if there was anything else he wanted to say.
- "The Countdown marking my final revenge on this world has begun! In a few minutes, you will be destroyed! Space Colony ARK will hurtle through the atmosphere and crash into this planet with devastating force! You have no time to prevent this disaster and absolutely no hope of survival! Your rulers took my granddaughter Maria from me, so I'm destroying everything you care about. Now you'll feel what I felt when I lost Maria. You'll see. You'll see... You'll See!"
Maria was Gerald's granddaughter and his main reason for taking part in Project Shadow. He went insane after he death, only thinking how to avenge her.
At first, Doom and Gerald worked together to develop Shadow, but once Gerald learned what Black Doom was really up to, he developed the Eclipse Cannon to destroy the Black Comet without telling Black Doom.