Basically, if a player performs some secret challenge in game (variable in difficulty, like "Rightfully kill 10 innocents in a single round", "Survive 3 minutes as an innocent with less than 20 HP", "Survive the round as an innocent being wounded by 3 different traitors", "Perform the round-winning kill within 5 seconds from round start" etc.), either a secret end theme - fitting performed challenge - plays or the player is rewarded the theme as an inventory item to be usable anytime in future.
Example 1: A traitor is on a killing spree and killed more than 10 innos in one round. They are rewarded with the drop from JACKNIFE's "Rapture".
Example 2: An inno is lucky enough to survive 3 killing attempts from 3 different traitors. They are rewarded with the drop from this epic track with long-ass title.
If the theme is played everytime a challenge is done, it could be a kind of an event, making people try their best.
If the theme is given as an item to whoever completes a challenge, these would be valuable and desired, given their obtaining would require a large amount of either luck or skill.
Or it could be both.
Example 1: A traitor is on a killing spree and killed more than 10 innos in one round. They are rewarded with the drop from JACKNIFE's "Rapture".
Example 2: An inno is lucky enough to survive 3 killing attempts from 3 different traitors. They are rewarded with the drop from this epic track with long-ass title.
If the theme is played everytime a challenge is done, it could be a kind of an event, making people try their best.
If the theme is given as an item to whoever completes a challenge, these would be valuable and desired, given their obtaining would require a large amount of either luck or skill.
Or it could be both.