Costume Party is a simulation game available on PC. Recent coverage indicates the title has been featured in discussions around cosmetic progression systems, particularly regarding unlockable camo challenges and mastery rewards that players can pursue. The game appears to have active seasonal or event-based content that introduces new cosmetic objectives for the community to work toward.
via GameRant
The Camo Costume Party has started for Call of Duty: Black Ops 7, giving players more Mastery Camos to unlock. Here is every Camo Challenge.