1.2.1

The 1.2.1 patch, also known as the Halloween Update, added several new features, fixed various bugs, and made various game changes. It made Halloween Terraria's second seasonal event (after Christmas) and introduced the Pumpkin Moon.

Bug Fixes

 * Fixed an issue causing walls to not have different frames
 * Fixed an issue with world saves being larger than they should
 * Frozen Slime Blocks are now craftable
 * You can no longer reforge Music Boxes
 * You can no longer place Campfires in water
 * Palladium, Orichalcum, and Titanium bricks now show correctly on the map
 * Placed Lihzahrd Brick Walls now show correctly on the map
 * Fixed a bug that would prevent Pirates from spawning
 * Titanstone Block now correctly blends with dirt
 * Fixed several typos
 * Minimap now draws over enemy health bars
 * Walls now correctly draw behind Super Dart Traps
 * Eater's Bone now correctly drops from the Eater of Worlds
 * Adjusted mannequin layering to draw armors correctly

Changes

 * Mice can no longer be killed by monsters
 * Mice can no longer spawn in hell
 * Magma Stone will no longer show a fire effect for non-melee weapons
 * Floaty Gross now cause weakness and drop Vitamins
 * Sunflowers now reduce Crimson’s effects
 * Crimson and Hallow now counteract each other
 * Reduces the chance for a mechanical boss summon to drop during hardmode
 * Hardmode Biome Keys must now be crafted from rare drops
 * Pygmy Staff has had its damage increased slightly
 * Updated female armor sprites
 * Added messages to help the player progress in hardmode
 * Reduced chance for a Dungeon Spirit to drop
 * Spectre Armor now requires Chlorophyte Bars to craft
 * Ghost Wings now need 10 ectoplasm to craft
 * Spectre Armor now only heals for 8% instead of 10%

Additions

 * Added Pumpkin Tiles and Walls
 * Added Hay Tiles and Walls
 * Added Spooky Wood Tiles and Walls
 * Added Goodie Bags that drop from most monsters during Halloween
 * Added new Pumpkin Moon event that will be available all year
 * Added new Halloween themed pets
 * Added new Halloween themed costumes
 * Added new Halloween themed paintings
 * Added new Halloween themed weapons and armor
 * Added Creeper set, which can be rarely found in goodie bags.
 * Several common enemies will now be in costumes
 * Hearts and Stars have been replaced with something more festive
 * Several friendly NPCs will sell costumes
 * Dryad will now sell Pumpkin Seeds year-round
 * Merchant will now sell an item to harvest hay during Halloween
 * Pumpkins will grow on their own during Halloween
 * Added new decorative items craftable from Pumpkins and Spooky Wood
 * Added Ravens
 * Added Ghost Enemy