The environment of the Anteverse contains a lake or "sea" comprised of a thick water like substance native to the Precursors' world, directed or channeled into large sacs where life forms lived and grew.
Biomechanical in nature, the Anteverse provided the colonizing Precursors a place to create and clone the Kaiju for the purpose of conquering and colonizing Earth after their first failed attempt during the Triassic period. Kaiju also seemed to be put in massive assembly lines waiting to be deployed.
On August 10, 2013, the Precursors created a portal bridging the Anteverse to Earth. The first Kaiju sent through the portal was Trespasser, who proceeded to attack San Francisco. After its opening, Kaiju began to move through the portal towards various cities located on the Pacific Rim.
Within the Anteverse, the Precursors used the hivemind system that connected them to the Kaiju to learn from the mistakes of the first wave that fought against the Jaegers. As they continued to produce clones of the Kaiju, repeated attempts to attack the Breach by the Pan Pacific Defense Corps ended in failure. The information gathered by the battles on Earth allowed the Precursors to create stronger and smarter Kaiju inside the Anteverse and unleash them on the battlefield to destroy the Jaegers sent to intercept them.
After Striker Eureka was equipped with a thermonuclear bomb to launch through the Breach, Striker Eureka and Gipsy Danger were deployed into the Pacific Ocean. Upon their arrival, the two Jaegers were attacked by Scunner and Raiju, prior to the arrival of Slattern. After a lengthy and aggressive battle, the pilots of Striker Eureka detonated the explosive, giving Gipsy Danger time to enter the Breach.
After killing Slattern, Gipsy entered the breach using the Kaiju's carcass. After falling through several organic layers of machinery, the mech finally arrived at the core of a massive Kaiju creation facility, where three Precursors viewed the Jaeger. After the mech's nuclear core was activated, much of the facility was obliterated, sealing off the rift for good.
- Portals to the Anteverse are designed with barriers so they can only be accessed by Kaiju, or material containing the genetic makeup of a Kaiju. Gipsy Danger was able to enter the Breach using Slattern's carcass.
- The Kaiju facility in the Anteverse appears to be underwater, as Gipsy Danger "floats" down after entering the Breach. However, it is not; the facility simply has an artificially generated gravity column to allow access to the breach mechanism entrance.
- The passage of time in the Anteverse is relatively different from our own universe.
- ↑ 1.0 1.1 1.2 1.3 Pacific Rim
- ↑ 2.0 2.1 2.2 Pacific Rim: Man, Machines & Monsters, page 150-154
- ↑ 3.0 3.1 Pacific Rim: The Official Movie Novelization, page 170
- ↑ @TravisBeacham July, 28, 2013
- ↑ Travis Beacham: Is the Anteverse under water?
- ↑ Travis Beacham: Hello, I was wondering if time could pass differently in the kaiju universe?