December 23rd, 2015 
Mark We’ve just published a new Balance test map titled Orbital Shipyard (3.1.0 Balance v1.1), which was created to explore a number of balance changes. These include the following:
- +Shield damage has been removed from Disruptors
- The damage upgrade to Zerglings has been reduced from 40 percent to 30 percent
- The amount of spell damage from Vipers has been reduced from 90 to 60
- Thor AA damage was changed to a flat 12
- Changed Adept flag to armored
- Photon Overcharge has also been adjusted:
- Energy cost is increased from 25 to 50
- Duration is increased from 15 to 20 seconds
- Damage is increased from 30 to 45
- Ravager morph time has been increased from 12 to 20 seconds
We encourage you to test these changes – to do so, just go to Multiplayer, and navigate to Custom. The test map will be at the top of the list. We look forward to hearing your feedback and seeing how these changes affect the game, and please remember that none of these changes are final.
Balance Testing Extension Mod
We’ve also updated the Extension Mod for balance testing, so that you can play around with these changes on a variety of maps. Those of you who are interested in trying out the Extension Mod can do the following to get started:
1.Navigate to Browse Maps on the Custom Games menu
2.Select a map and click the Create with Mod button in the lower right corner
3.Choose to sort by Blizzard Mods from the dropdown list at the top of the screen
4.Select the “Balance Test Mod” Extension from the list and then hit Create Game
If you're interested in the StarCraft II Balance Team's reasoning behind these potential changes, you can check out Senior Designer David Kim's Community Feedback Update.
We’d like to remind you that feedback based on playtesting is the most helpful information you can share with us at this time. We kindly ask that you spend some time playing games on the test map before offering your thoughts on the changes listed above.
As always, thank you for your continued feedback and support. Once you feel you’ve had enough time to test thoroughly, we welcome you to share your feedback!
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