Basically a valuable piece of intelligence relating to a faction, clues can be acquired by assigning Operators to the Reception Room, who will acquire one after a certain time has passed, which can be sped up if the assigned Operator(s) have base skills related to the Reception Room. Additionally, a clue is given every 24 hours (04:00 AM UTC-7), but this one cannot be stacked and the player must have assigned at least one Operator in the Reception Room to receive it. The player can have up to 10 clues at a time; once this limit is reached, the clue generation will be paused until any of the clues are removed.
Normally the received clue is selected at random, but certain Operators' base skills can increase the odds of receiving the clue from a specific faction. Receiving a clue awards 20 and they can be placed on the Reception Room; once the seven different clues are placed, the player can initiate a Clue Exchange for the next 24 hours, during which friends who visited the player's Reception Room will receive 30 and the player themselves will receive 210 at the end of a Clue Exchange.
Excess clues can be given to friends, awarding 20 for the player and up to 30 every day for the receiver (15 for the first, 10 for the second, and 5 for the third). Clues received this way are not counted towards the clue limit, but will expire if not used after 10 days and cannot be given to other friends.
Below is the list of clues and which Operators are capable of discovering them better than others:
Clue search speed is influenced by the following:
- Operators that are not distracted (have >0 morale): +5%
- Total Ambience of Dormitories
- 2000 ~ 2999: +5%
- 3000 ~ 3999: +10%
- 4000 ~ 20000: +15%
- Operator rarity
- Operator promotion
- Elite 1: +8%
- Elite 2: +16%
This means that 12F (whose total clue search rate increase is +25%) has the same searching speed as an Elite 2 5★ Operator and 1% less than an Elite 2 6★ Operator without base skills related to the Reception Room.
- For unknown reasons, Clue No. 7 is the most commonly-received one by default when searching in the Reception Room. This results in many players having and giving each other Clue 7 and only Clue 7, since that's all they've got, while others are a relative rarity by comparison.