Update v20190519:

Online Party
Fixed a bug where an extra copy of other players would show up in the player list
Fixed a bug causing enemy deaths to not sync
Fixed the join act prompt appearing while in photo mode

General
Fixed inconsistent rare sticker alerts
Added a machine in the spaceship which reads back the latest rare sticker alerts
Updated Chinese localization
Updated Korean localization
Fixed massive log files when mods would continuously emit the same error
Fixed a save data crash

Spaceship
Fixed the intro camera looking at the attic before it was unlocked

The Arctic Cruise
Fixed a missing rare sticker

Nyakuza Metro
Fixed a crash caused by bouncing one of the queuing cats into a vacuum

Modding
Mods can now send commands to other players in Online Party
Mods can now create their own virtual / wireframe / etc flair overrides
Added a "Sync for Online Party" property to checkpoints
Fixed being unable to open mod maps that were using ladders
Fixed crash when cooking mod packages
Game Mods now inherit from Hat_GameEventsInterface and can use all the events within
Added a "Online Party" checkbox to the Mod Manager