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When we started Apex Cybernetics, we dreamt of new ways to push past the limits of human potential. Robotics, the human mind, artificial intelligence. Who knows what brave new future we will dream of next? I'm Walter Simmons. And it is my privilege to lead Apex into humanity's bold new era. We're not going anywhere, and neither are you.
At first, Walter seems like a well-spoken and calm man who seeks to better mankind and help the world became a safer place. But his view of the Titans being seen as a threat puts him at odds with Monarch. Walter became very delusional and corrupt in his goals and attempts to rid the world of Titans by all means.
Simmons founded Apex Cybernetics in 2014. His goal was to rid the world of the Titans so control could be returned to humanity. In 2019, Simmons purchased the severed head of King Ghidorah so he could construct his own Titan to combat the Titans, thus beginning the development of Mechagodzilla. Five years later, in 2024, all Titans excluding Godzilla and Kong have went back to hibernate all cross the world. Godzilla then attacks an Apex facility manufacturing Skullcrawler eggs that are transported to the Apex headquarters in Hong Kong. During a test battle against a Skullcrawler and Mechagodzilla, the test is cut short due to limitations of the power supply. After learning of the Hollow Earth, Simmons intends to harness the raw energy of Hollow Earth to overcome Mechagodzilla's limitations.
Simmons recruits Nathan Lind to explore into the Hollow Earth and obtain a sample of the energy, using his daughter Maia as the leader of the Apex expedition. They soon find an energy source and send its signature back to the base. Apex also catches Bernie, Josh, and Madison and have them interrogated by Simmons. Madison calls out Simmons for using Ghidorah to create Mechagodzilla as the reason Godzilla rampaged, claiming hundreds to thousands of lives. Showing no remorse for his actions, Simmons orders the activation of Mechagodzilla, despite not testing the energy source first. This causes Mechagodzilla to go haywire, as the energy source causes Ghidorah's consciousness to possess Mechagodzilla. Simmons can only look on in horror before Mechagodzilla swiped its claw straight through the Apex module, killing him instantly.