Test

There are two testing systems within the Inner Tower: the current system designed for Regulars and the ancient system designed for Irregulars. The current testing system was likely implemented after Zahard, the 10 Great Warriors and his helpers had conquered the first 134 Floors of the Tower.

To be more precise, only 2 types of people are allowed to take tests in the Inner Tower: a Regular or an Irregular. A person can't be both or neither.

Current Testing System
When a Regular is climbing the Tower, he or she has to pass one or more tests on each Floor.

The tests are created to determine whether the regular is worthy of going to the next floor. Generally the difficulty increases the higher one climbs. There are however a few exceptions, like the 2nd Floor and the 20th floor, where the difficulty is particularly high.

The tests are given to the regulars by either the Guardian of the floor or, more often, by the Guardian's proxy, the floor's Ruler. Each floor's Ruler has the right to decide the exam of his floor. But if the Guardian raises objections, the Ruler must follow the Guardian's wish. And these exams are then taken by future test takers, politically named as regulars.

To be considered worthy of taking the next test, each Regular must pass all the previous tests. They may only be excluded from taking certain tests if they've "passed early" (Ch 36). There might be other conditions which allow one to be excluded from a certain test but these are unknown yet.

On the 2nd Floor, certain individuals who excelled and received the highest score in the previous test were awarded "Best Seed"(Ch 28). Such people were graded by at least some or all of the Testing Admins and possibly, Yu Han Sung. It's unknown if this term might occur again.

From the 3rd Floor and on, even if a Regular fails, they have the right to retake the tests. Most or all tests on a floor are compulsory and you need to pass a test to proceed to the next. This means if a Regular passed 1 to 2 tests but failed at the next test, he fails the Floor. He has the right to retake the Floor but he must start all over again. This is why Yeon Yihwa and Ja Wangnan are stuck on the 20F and they had to go through the first test and also, take the other tests.

The Guardian's tests
This is an actual fact, the original testing system and designed to test an Irregular.

After being chosen to enter the Tower(Ch 76), an Irregular is then teleported to the First Floor of the Inner Tower to take the Guardian's test (conducted by Headon). And only an Irregular can request to take a Guardian's test (Ch 58). Take note that one cannot become a "chosen one" or an Irregular by participating in the Guardian's test, like Baam's or Rachel's group in the Submerged Fish Hunt test. The Guardian's test itself is binded by a set of the Tower's Rules.

The Guardian's test reflects the "worth of the things"(Ch 4) the Irregular wishes to gain from the Tower and in essence, his desires(Ch 58). How precious are the things he wants which in turn, determines their worth to him? What are the lengths will the Irregular go to obtain his heart's desires and is he willing to undergo gruelling challenges to take the journey of fulfilling them at the top? And as he climbs the Tower, will he give up in the the middle of a test or after having passed numerous tests?

When the Irregular passes a Guardian's test, it is possible the Guardian may fulfill part or all of his wishes expressed before the test(Ch 58). However, the wishes made to each Guardian are likely just part of his heart's desires. He will then be teleported to the next Floor (Ch 4), except for the 43rd Floor because the Guardian is dead. But if he fails or gives up while taking the test, he may not pass and he may not ascend to the next Floor. It is unknown if Irregulars who fail to pass a Guardian's test are allowed to retake it or are promptly disqualified from climbing the Tower.

Specifics of Guardian's tests
Each Guardian's test is prepared to suit each and every Irregular's desires. How a test proceeds, also depends on the decisions and actions of each Irregular. Likely, no test is identical even though all of them might start out the same.

These tests are all gruelling challenges but they too reflect how well an Irregular knows his limits, his judgemental skills. They reflect his ability to take into account the circumstances and make logical and rational decisions based on such information. Is he too stubborn and blind to form a sound decision? Using his innate self-awareness, he must form and execute plans on the spot.

A solution for one Irregular may be another Irregular's failure or death. In short, each test also determines if an Irregular is determined to rush to a fool's death in order to fulfill his heart's desires. If so, he is not worthy of being chosen.

For example: Rachel probably made a sound decision by refusing to face the White Steel Eel as she took her limits into consideration. She didn't have the physical strength and probably agility required to face it. For Baam, he could face it because he was very agile to dodge past it and his size allowed him enough to slip into the Steel Eel's mouth without incurring much injuries.

If an Irregular is 3m tall and very large and muscular, he can't slip into the Steel Eel's mouth and might die if bitten by the Shinheuh. So even if he survives being bitten by the Steel Eel, he might actually fail the Guardian's test as he has demonstrated poor judgemental skills and poor awareness of his own abilities. Whereas a better way would be to wait for the Steel Eel to open its mouth and quickly run backwards to maintain a distance. While its mouth is still open, quickly target its tongue using a weapon like a bow, gun or javelin. And also, perhaps take out its vision with a weapon to buy time and to hopefully, confuse it. While the fish is stunned and unable to move, then quickly pop the Ball.

An Irregular is also tested on their ability to not waver, even after they've been told their desires might not be attainable, that they're unworthy of being chosen and so on. They must have faith in themselves and not be swayed by the Guardian's words, even though the words might cut deeply.

For example: On the First Floor, Baam was tested on whether he'd give up after hearing the Tower was vast and he might not be able to find the girl. Headon might even have allowed him to receive help, to determine if assistance and kindess from others would weaken his resolve.

Part of Rachel's test involved determination to not waver, after hearing Headon's words. She had to possess the strength to carry on, even if Baam had passed to the next Floor. She had to be determined to proceed, even if she didn't get any help. The deal she made with Headon was likely a reflection of this test as it meant she was willing to go to extreme lengths, to climb the Tower.

A Guardian's test also reflects the greyish morality of TUS.

For example: Rachel passed the Guardian's test on the Second Floor by proving she was willing to sacrifice someone precious to her heart(Baam). By showing her determination didn't waver even after she had to encounter him many times and by summing the courage to push him down, she passed.

First Floor:

 * Baam's Test: Irregular's Test(included The Ball Test)
 * Rachel's Test: Irregular's Test(included test of judgemental skills to reject The Ball Test)

Second Floor:

 * The Deathmatch Test.
 * Lero-Ro's test.
 * The Door Test.
 * Crown Game (a bonus game).
 * The Position Test.
 * The Hide and Seek Test.
 * The Submerged Fish Hunt Test.

20th Floor:

 * Survival Round
 * World's Strongest Regular
 * The Untrustworthy Room (a bonus game made to find a team for Viole)

43rd Floor:
No tests because Guardian is dead.

Special Tests
Tests in the Tower also include certain special tests. These tests may or may not assist in further progress in climbing the Tower, but may also carry other kinds of benefits.

Known examples of this kind of tests:
 * The Won-sul-sa test taken at The Research Association. Taking this test makes one a certified Won-sul-sa user.
 * Iron Man, This is a special contract that only members of the Mule family can obtain, and to do so the family had to take a special test from an unspecified guardian.
 * The two mole like drawings under Lero-Ro's eyes, these symbolize that he has passed a special test (what kind of test is unknown).