2.4

2.4, also known as the Land of the Dead, is a major update released on 21 September 2015. It's most notable additions were two new dimensions, and the fragment temples. 11 bugfix updates have been released for 2.4, ranging from 2.4.1 to 2.4.10 and 2.4.B.

Additions
Things that were added in the 2.4 update:

Skills

 * Hermetism
 * Untrainable, for now.
 * Logging
 * Butchery
 * Extraction
 * Replacing Calefaction.

Resource Systems

 * Battle Rage
 * Replacing Vitality.

Dimensions

 * Immortallis
 * An ancient dungeon dimension.
 * Creeponia
 * A creeper-themed dimension.

Mobs

 * For Creeponia:
 * Creepuple
 * Creepird
 * Creeperlock
 * Creep Cow
 * King Creeper
 * Winged Creeper
 * Magical Creeper
 * Bone Creeper
 * Cave Creepoid
 * For Immortallis:
 * Reaver
 * Urioh
 * Goldum
 * Skelekyte
 * Skeledon
 * Shavo
 * Fenix
 * Urv
 * Ghastus
 * Visage
 * New Fragment temple mobs:
 * Mega Guardian
 * Sceptron
 * Fade
 * Centurion
 * Poseido
 * Torano
 * New Lunalus mobs:
 * Zorp
 * Zarg
 * Baumba
 * Refluct
 * New Event mobs:
 * Death Hunter
 * Reaper Twins
 * Headless Destroyer
 * Triclops
 * Host
 * Wood Giant
 * Stone Giant
 * Sand Giant
 * Leafy Giant
 * Ice Giant
 * Irkling
 * Roloscope
 * Modulo
 * Vertebron
 * Walker
 * Other new mobs:
 * Mushroom Spider
 * Daysee
 * Fischer
 * Arkzyne
 * Crusilisk
 * Blood Lust
 * Orbling

Bosses

 * The Immortals
 * C.R.E.E.P.

NPCs

 * Dungeon Keeper
 * Token Trader
 * Creeponia Lottoman
 * Creep Banker
 * Explosives Expert
 * Vulcanism Master
 * Butchery Master
 * Logging Master
 * Hermetism Master
 * Extraction Master

Events

 * Death Day Event
 * Creep Day Event
 * Big Day Event
 * Lunar Event

Blocks

 * Archaic Tiles
 * Archaic Dirt
 * Archaic Lamp
 * Archaic Glass
 * Archaic Ladder
 * Immortallis Progressor
 * Gold Accumulator
 * Pure Gold Accumulator
 * Creeponia Grass
 * Creeponia Dirt
 * Creep Grass
 * Creep Flowers
 * Creep Wood
 * Creep Leaves
 * Creep Vines
 * Creep Wood Planks
 * Creep Wood Stairs
 * Creep Stone
 * Unstable Stone
 * Primed Stone
 * Ornamyte Ore
 * Gemenyte Ore
 * Jewelyte Ore
 * Creeponian Bricks
 * Creep Altar
 * Celevus Planks
 * Celevus Stairs
 * Immortal Banner
 * Fragment Banner
 * Creepoid Banner
 * Creepy Banner
 * Extraction Device
 * Enhancers
 * Creep Statue
 * Golden Creep Statue

Items

 * Starting Coin
 * Impure Gold
 * Pure Gold
 * Progress Coin
 * Dungeon Tokens
 * Augments
 * Gemenyte
 * Jewelyte
 * Ornamyte
 * Explosive Gems
 * Creeponia Gems
 * Creeponia Realmstone
 * Immortallis Realmstone
 * Orbulon
 * Realmstone Fragments
 * Blood Accumulator
 * Creepoid Greatblade Totem
 * Boom-Boom Totem
 * Infusion Blueprint
 * Strange Realmstone

Tools

 * Ornamyte Pickaxe
 * Ornamyte Shovel
 * Ornamyte Axe
 * Occult Pickaxe
 * Occult Shovel
 * Occult Axe
 * Soulstone Pickaxe
 * Soulstone Shovel
 * Soulstone Axe
 * Goofy Pickaxe
 * Goofy Shovel
 * Goofy Axe
 * Energistic Pickaxe
 * Energistic Shovel
 * Energistic Axe

Weapons

 * Vulcammer
 * Odious
 * Deadlock
 * Everfight Staff
 * Evermight Staff
 * Vulcane
 * Creepified Sword
 * Discharge Shotgun
 * Missile Maker
 * Concussion Staff
 * Krasaun's Dawn
 * Sabbath
 * Beamer
 * Revolution
 * Dual Sight
 * Vivo

Armor

 * Archaic Armor
 * Omni Armor
 * Mercurial Armor
 * Vulcanism Armor
 * Butchery Armor
 * Logging Armor
 * Hermetism Armor
 * Extraction Armor
 * Battleborn Armor
 * SpaceKing Armor
 * Zargonite Armor

Structures

 * Explosive Tower
 * Creeponia Lotto Structure
 * Creeponia Bank
 * Creeper HQ
 * Spider Cave
 * Daysee Flower
 * Arkzyne Tower
 * Crusilisk Cave
 * Fragment Temple

Other additions

 * AoA Notice Board

Skill-Related

 * Vulcanism fully implemented and trainable.
 * Skills are now toggled with the I key by default, instead of the C key.

Expedition

 * Tweaked how Expedition works slightly.
 * Riding a horse can no longer be used to gain experience.
 * Added three new modes as rewards for training skill, depending on the current mode determines the reward received.
 * Wind beneath feet is now a mode.
 * No reward is also an option.
 * Modes can be toggled with the UP key by default. Can be changed in the Controls settings in the Options menu.

Infusion

 * Power Stones (excluding Ambient) now have a small (0.5%) chance to randomly drop off of creatures.
 * Changed how Infusion works.
 * Old method using glowstone dust has been replaced with a new method using Enhancers.
 * Infusion Tables are no longer craftable directly. The recipe has been transferred to the Infusion Blueprint.

Calefaction

 * The Vitality bar was changed to the Battle Rage meter.
 * Calefaction, Calefaction Armor, and the Calefaction Master were all replaced with their Extraction counterparts.

Other changes

 * Thermal armor was renamed to Battleborn Armor.
 * The full set bonus was also changed.
 * The Recreation Station now has a use.
 * Banners hitboxes were shifted to the top half of the banner.
 * All tea types now heal health instead of warmth.
 * Heat Lamps are renamed to Life Lamps.
 * Now named life lamps now regenerate health when the player is near them, instead of warmth.
 * Campfires now regenerate health when the player is near them, instead of warmth.