Floor 13 Chase Test

Lore & Background

The Great Tower's lower floors are often described by climbers as a gauntlet of escalating physical and social trials, and Floor 13 sits squarely in that gauntlet. The Chase Test's design philosophy is deceptively simple: a line of participants, a defined course, and the imperative to overtake the person in front while keeping the person behind at bay. What makes it psychologically taxing is the asymmetry of stakes—every climber is simultaneously predator and prey, and the line's position determines how much pressure you feel from both directions.

Within the broader narrative of Tower of God, tests like this one serve a dual purpose. On the surface they measure speed, stamina, and spatial awareness. Beneath that, the White Tower's system uses them to observe how climbers behave when cooperation is possible but not guaranteed: do you slow down to let a struggling companion keep pace, or do you sprint ahead and risk being overtaken from behind? The Tower records these micro-decisions, and they subtly inform the kind of higher-floor trials a climber will eventually face.

For Bam, whose defining trait is an almost irrational commitment to protecting the people running beside him, the Chase Test becomes a quiet character study. The narrative uses the test's mechanical tension to externalize his internal conflict between self-preservation and loyalty, a theme that will echo across dozens of subsequent floors.

In Their Own Story

The track hummed underfoot—a low, resonant vibration that seemed to rise through the soles of Bam's shoes and settle somewhere behind his ribs. Ahead, the runner's back was a blur of motion, arms pumping, breath ragged in the recycled air. Behind him, the sound of another pair of feet closing in, steady as a metronome, patient as a shadow.

Bam's jaw tightened. He could feel the line stretching, the gap to the runner ahead widening by inches with every stride. The person behind him was faster. He knew it the way you know a storm is coming—not from the sound, but from the pressure change in the air.

He glanced sideways. Two of his companions were struggling, their rhythm broken, their steps uneven. The instinct to slow, to match their pace, to let them breathe—

No. If he slowed, the runner behind would close. And then the line would snap, and everyone behind him would be caught.

So he ran. Not faster. Just… steadier. He found a cadence that let the two behind him keep the gap, let the runner ahead stay just out of reach, let the whole line hold together like a chain strung tight over a cliff's edge. His lungs burned. His legs screamed. But the line held.

And when the track finally curved and the finish marker flashed its cold white light, Bam's first thought wasn't relief.

It was: *Did they all make it?*

Reader's Guide

Floor 13 – The Chase Test

The test takes place on a defined running course within the floor's chamber. All registered baseloaders are arranged in a single-file line at the start. The rule is absolute: you must close the distance to and physically overtake the runner directly ahead of you before the runner directly behind you overtakes you. If either condition is violated—your gap to the front runner exceeds the allowed threshold, or the runner behind makes contact—you are eliminated from the test.

The unique twist lies in the interdependence of the line. No single climber can simply sprint to victory; the line must hold together. A runner who sprints too far ahead creates a gap that the runner behind can exploit, and a runner who lags too far becomes the primary target for the person trailing them. Strategy, pacing, and reading the rhythm of the runners around you matter as much as raw speed.

Bam and his companions attempted the test as part of their early-floor progression. The group passed, though the narrative emphasizes the tension Bam felt in balancing his own pace against the need to keep struggling companions within the safe gap. No climber in their group was eliminated.

The test reveals a core design philosophy of the Tower's lower floors: even the simplest mechanical trial is engineered to expose how a climber relates to others under pressure. The Tower is not merely measuring whether you can run. It is measuring whether you can run while carrying the weight of the people beside you.

Did You Know?

• The Chase Test's interdependent line mechanic means that a single climber's poor pacing can cascade and eliminate multiple runners behind them, making the test as much about group dynamics as individual speed.
• In the broader Tower structure, early-floor tests like this one are designed to be passable by the average baseloader; the real filter is not failure but the behavioral data the Tower collects from how you choose to run.
• Bam's approach to the test—prioritizing the rhythm of his companions over his own margin of safety—mirrors the character trait that defines him throughout the series: he optimizes for the group, not himself.
• The pursuit format of Floor 13 is a deliberate tonal shift from the more solitary or puzzle-based tests on the very lowest floors, signaling to the climber that the Tower is beginning to test social and cooperative insti