Here is a list of known updates at the time of this writing. The most reliable source of updates is to join the Killer Queen Black Discord server and check the #release-notes channel.

You can also check the Killer Queen Black Trello board or Roadmap for updates that may be coming out soon.

2/20/2020 (Hydra 1.61) Update

Hydra 1.61 Release Notes

  • Fixes the issue where adding more than four Xbox controllers was not allowed
  • Fixes a bug where Steam profiles were appearing on Switch
  • Fixes a clipping issue on The Spire
  • Fixes an issue where Steam usernames would go unfiltered on Switch
  • Fixes an issue where a sacrificed worker could spawn in an incorrect location after the rider was killed
  • Fixes an issue where soldiers could collide with the snail
  • Fixes an issue where the penalty timer for disconnects during ranked play would not show up
  • Fixes an issue where you could not back out of role select
  • Fixes the issue where having many friends causes some not to show up
  • Fixes an issue where uneven teams in Ranked still lose points
  • Change the color of latency indicators to better match the severity of latency
  • Fixes the issue where thrown berries into the enemy hive would count towards your berry stats
  • Fixes the issue where a profile picture may appear all white

1/21/2020 (Hydra) Update

Hydra 1.6 Release Notes

  • Eight player local support for PC and console
  • Region selection now available on Switch
  • Custom (online) and local matches can now be started by a single player
  • Fill with bots added for local and custom matches
  • Players can now shuffle teams automatically in local and custom matches
  • Streamer mode: Choose which names to display in-game and in menus
  • Map pools now skew towards more variety and fewer repeats
  • Many bug fixes and UI improvements

11/22/2019 (Gemini) Update

Video Summary of New Friend System

Cross-platform party support

  • LiquidID - Each player, regardless of platform, will now have a unique ID
  • Friend invites/inbox
  • Game and controller performance improvements [Switch]
  • Remove idle timeout in local wireless
  • Voice chat UI now enabled in custom match lobby
  • Reduce AFK timeout 60s -> 30s
  • Network connectivity and latency improvements
  • Settles ties between queen assignment based on MMR (only in ranked)
  • Various small bug fixes and UI improvements

Map changes

Tally Fields:

  • Added space between the start hive zones
  • Moved two berry piles from the top to under the hives
  • Moved center berry pile to the underside of the center platform

Helix Temple:

  • Moved two berry piles from the top of the map to the bottom of the snail platform near the center gate Spire:
  • Changed top gate to Morning Star/Sheild from Speed/Shield
  • Changed bottom gates to Sword/Speed from Sword/Morning Star

Juniper:

  • Random hive exits removed, now you only exit from the hive you entered unless it is full

10/25/2019 Update

Most of these updates are for switch, but in order for everybody to play on the same servers, PC updates are required.

Updates (read: Fixes): - Controller configurations will persist on switch - "Show Names" works on switch - Local Wireless works w/o Nintendo Online subscription / Don't need to do that weird hack to make it work w/o Nintendo Online - Switch now won't spam "ready up" sounds during character select - Local Wireless will only show KQB rooms, not others

source @Adam Liquid Bit#4392 on Discord