The official name of the update was revealed at PAX Prime 2012 during the Minecraft panel, then later with snapshot 12w36a.[2]Dinnerbone first revealed the 1.4 release date with snapshot 12w40a, where he stated that he was fully into the "Prepare for release" mode.[3]
Development on the Pretty Scary Update began the week after 1.3.1, which was released on August 1, 2012. 15 development snapshots for 1.4 from 12w32a to 12w42b were released. During the development period, 1.3.2 was released. The 1.4 Pre-release was unveiled on October 19, 2012, so that modders could start preparing their mods before the launch on October 24, 2012.[4]
Mojang found a mob suffocation bug after this was released, and was forced to delay the launch by a day. The 1.4.1 Prerelease was unveiled on October 23, 2012,[5] and the release was pushed back a day.
Mojang then found yet another bug, and fixed "a severe memory leak in the server". This, as well as correct rendering of fences and cobblestone stairs, came in the 1.4.2 Prerelease, released on October 24, 2012.[6] 1.4.2 was the first official release of 1.4, available through the launcher on October 25, 2012.
A bug was introduced whereby a player could not achieve the The End? achievement.
The Pretty Scary Update was originally intended to include the Modding API, however it was pushed to a later version.[7]
Lighting bugs present in 1.3.2 were partially fixed. Dinnerbone first introduced changes in snapshots 12w39a/b. Dinnerbone tweeted to revert and push this to 1.5.[8][9] Other changes postponed to 1.5 include redstone changes[10] and a rendering overhaul.[11][12]
Requires a pyramid structure composed of either iron, gold, diamond, or emerald.
The more tiers to the pyramid, the more status effects become available.
When placed on top of the pyramid structure, it shoots out a beam of light.
Entering its GUI shows a list of status effect depending on how many pyramid tiers are available, and will activate those effects upon inserting either an iron ingot, gold ingot, diamond, or emerald.
Upon summoning, the wither slowly charges up and is invincible. After a few seconds, the area around the wither explodes and it starts attacking players and non-undead mobs.
Its heads can fire wither skulls that explode upon impact.
Zombies and skeletons can now spawn with armor, and zombies now have a chance of turning a villager into a zombie villager, instead of the villager dying.
Zombie pigmen now have a chance to be able to pick up items.
1.4.4 addressed bugs while also adding the music disc "where are we now" as "wait" and making "11" obtainable from creepers killed by skeletons for the first time.
A trailer by Hat Films documenting some of the Pretty Scary Update's major features was released on Mojang's official YouTube channel on October 26, 2012.