26th December—2012 Season 5 Locked
As of December 26, 2012, leagues were locked, although hidden ratings remain.
24th December—Creative Development Q&A Part 10
20th December—Heart of the Swarm Beta Unit Spotlights and Expanded Access
Blizzard has posted details on Heart of the Swarm beta units and offering beta access to anyone who preordered Heart of the Swarm before December 18th. (Those who bought afterward will still be invited in waves.)
19th December—2013 Season 1 Maps
New maps have gone live—Akilon Flats and Newkirk District, both based on Heart of the Swarm beta maps.
18th December—Heart of the Swarm Balance Update #10
Blizzard released a small update for Heart of the Swarm.
17th December—Creative Development Q&A Part 9
12th December—Heart of the Swarm Balance Update #9
Blizzard released a small balance update for Heart of the Swarm.
10th December—Creative Development Q&A Part 8
5th December—Heart of the Swarm Beta Patch 2.0.2/Balance Update #8
Blizzard introduced a patch for Heart of the Swarm. Details include Groups (also known as clans), selecting players near you, giving orders to AI partners, Arcade availability, UI changes, and physics updates. "Attached" is a balance update.
4th December—December 4th Wings of Liberty Patch
Blizzard introduced a new patch for Wings of Liberty today.
3rd December—Creative Development Q&A Part 7
30th November—Call to Action
Blizzard is testing another Call to Action "patch".
26th November—Creative Development Q&A Part 6
20th November—Call to Action
Blizzard is now testing Antiga Shipyard (1.5.3 Balance) with minor zerg nerfs. See the details here.
17th November—Battle.net World Championship live
The Battle.net World Championship goes live Saturday November 17 to Sunday November 18 in Shanghai. The 32 best StarCraft II players will be there.
13th November—Blizzard announces release date of Heart of the Swarm!
8th November—RISK: StarCraft Now on Sale
6th November—Flashpoint Published
StarCraft II: Flashpoint is published today.
5th November—Creative Development Q&A Part 5
Brian Kindregan answers a fifth batch of lore questions.
1st November—Heart of the Swarm Beta Patch 2.0.1 Live
The newest Heart of the Swarm beta patch went live. It does not focus on balance changes.
1st November—2012 Season 5 Begins
2012 Season 5 has gone live.
1st November—Comic Contest Back For Another Three Months
Blizzard has reopened the comic contest from November 2012 to January 2013.
29th October—Creative Development Q&A Part 4
Brian Kindregan answers a fourth batch of questions.
26th October—Heart of the Swarm Beta Patch #7
Another Heart of the Swarm beta patch goes live.
24th October—2012 Season 4 Locked
2012 Season 4 is now locked. The next season opens November 1st.
22nd October—Creative Development Q&A Part 3
Brian Kindregan answers yet more lore questions.
18th October—2012 Season 4 Lock Incoming
2012 Season 4 will be locked on Wednesday, October 24 and the new season opens on Thursday, November 1st. Details here.
15th October—Creative Development Q&A Part 2
Brian Kindregan answers more StarCraft lore questions here.
12th October—Heart of the Swarm Beta Patch #6
Another Heart of the Swarm beta patch goes live. Details here.
8th October—Creative Development Q&A Part 1
Brian Kindregan answers questions about StarCraft and Heart of the Swarm lore here.
5th October—Heart of the Swarm Beta Patch #5 Live
The newest HotS beta patch is live.
28th September—Heart of the Swarm Beta Patch #4 Live
Blizzard released a new Heart of the Swarm patch, focusing on the mothership core.
21st September—Heart of the Swarm Beta Patch #3 Live
Blizzard released a new Heart of the Swarm patch, focusing on changes to the protoss.
18th September—Patch 1.5.3 Live
The patch changes are listed here.
14th September—Heart of the Swarm Beta Patch #2 Live
The patch changes can be read here.
11th September—2012 Season 4 Begins
Blizzard has launched 2012 Season 4.
10th September—Game Guide Updated
Blizzard has updated the game guide for StarCraft II again, with "tips from the creators of guides such as Mojo StormStout’s Warcraft III Strategy Guide and the Diablo II archive The Arreat Summit".
8th September—Heart of the Swarm Beta Patch #1
Blizzard has announced the details of the first balance patch for Heart of the Swarm.
6th September—Season 8 Locked
Blizzard locked season 8, and explained upcoming changes to the season system here.
4th September—Heart of the Swarm Beta Live!
Blizzard announced that the Heart of the Swarm closed beta test has gone live.
21st August—Patch 1.5.2 Released
Blizzard released Patch 126.96.36.19975 today. Follow the link to read the patch notes.
15th August—Heart of the Swarm Beta Coming Soon
Blizzard wants you to know that the Heart of the Swarm beta is starting soon. Potential testers can update their account preferences Beta Profile Settings to allow StarCraft universe beta tests. This does not guarantee entering the beta, however.
15th August—Battle.net Security Update
Players on North American servers are instructed to change their security question as well as update their Mobile Authenticator. The links also lead to additional security device.
13th August—Heart of the Swarm Battle Report 3: Terrans vs Protoss
Day9 has uploaded the HotS Battle Report 3 here.
9th August—Battle.net Security Notice
This week, Blizzard discovered the theft of Battle.net user authentication data, including encrypted passwords, email addresses, security questions and authenticator information. Financial information was not obtained. Users with North American-based accounts should change their passwords as a precaution.
8th August—StarCraft II Patch 1.5.1 released
Blizzard released patch 188.8.131.5263 today. Some bug fixes.
8th August—Call to Action: Balance Testing
Blizzard is testing balance changes on Antiga Shipyard 1.5.0 Balance v1. Changes include modifications to the creep tumor and Raven.
1st August—Blizzard Comic Contest is Back
Blizzard has brought back the Comic Contest. See the rules in the link.
31st July—Patch 1.5 Full Version Live
Blizzard has released the full version of patch 1.5 today.
10th July—StarCraft II Patch 1.4.4 released
Blizzard released patch 184.108.40.20618 today. A small change for the Korean version.
9th July—Short Story Prize Winner
Blizzard released the winner of the Short Story Contest. The winning entry is a StarCraft story called The Exit.
29th June—Heart of the Swarm at Gamescom 2012
From August 15th to 19th, Gamescom 2012 will be held in Cologne, Germany, at the Koelnmesse. Heart of the Swarm will be available to play there.
22nd June—Arcade Beta Updates
Blizzard released a new beta patch. In addition, 500 beta keys are available to whoever rates custom games in Heart of the Swarm.
22nd June—Game Guide Update
Blizzard has massively updated the game guide section.
12th June—Season 8 Starts
Blizzard has opened up Season 8 on Battle.net.
8th June—Heart of the Swarm updates
Blizzard provided a massive update on Heart of the Swarm, including unit changes since BlizzCon 2011 and a Battle Report!
Update: a second HotS battle report from the MLG stream has surfaced on YouTube.Update 2: Blizzard has released the official video of the second battle report.
8th June—Season 8 Maps Announced
Blizzard released the season 8 maps early.
5th June—Season 7 lock
Blizzard has locked season 7 of StarCraft II. Season 8 will start the week of June 11th.
1st June—Patch 1.5.0 open beta
10th May—New Balance Changes
Blizzard updated StarCraft II today using a new format. Instead of a patch, the changes are made when the servers undergo maintenance. See StarCraft II version history for the latest changes.
7th May—Heart of the Swarm Developer Update
Blizzard released a developer update for StarCraft II: Heart of the Swarm today. Potential updates include a system to restore an interrupted multiplayer game (eg in an esports tournament), the ability to create different accounts for different parts of the world, and a clan system.
11th April—Heart of the Swarm info
Blizzard released new information for StarCraft II: Heart of the Swarm, such as new unit ideas and the cancellation of the replicant and shredder. Read the changes and reasoning here.
31st March—April Fools
Blizzard "announced" several news items for April Fool's, 2012, such as the "new game" StarCraft: Supply Depot.
2nd March—StarCraft Master challenges released
21st February—StarCraft II Patch 1.4.3 released
Blizzard released patch 220.127.116.1129 today. Added an attack range upgrade to the Phoenix and balance changes on ghost's snipe and MULE.
10th February—RISK: StarCraft announced
9th February—Preview of season 6 maps