1.19
General:
-- Heroes now properly cap xp at level 35
-- Difficulties are now chosen by a voting process during game load

All Maps:
-- Removed gold loot bag drops from several enemies
-- Increased XP value of friendly creeps from 19 to 45 xp (matters if Lich sacrifices them)
-- Higher level friendly creeps grant +20 xp
-- Rebalanced gold, xp, and timings of several wave options to make them worth roughly the same (for example, zombies used to give more than twice the gold of spiders)

Heroes:
// Arc Warden
-- Moon Shards and Upgrade Tools no longer do anything if used by the duplicate

// Invoker
-- Now uses the standard attribute bonus that everybody else uses

// Queen of Pain
-- Added radius to the target indicator on Shadow Strike

// Slark
-- Removed illusion ability to proc essence shift

// Warlock
-- Removed erroneous damage tooltip on Upheaval

Items:
// Black King Bar
-- Cooldown reduced from 40/45/50/55/60/65 to 55 seconds
// Boots of Travel 2
-- Channel time reduced from 3 to 2 seconds
// Hand of Midas
-- Cooldown increased from 60 to 100 (vanilla)
// Moon Shard
-- Fixed tooltip mentioning stacking
// Relic
-- Cost reduced from 4500 to 3800 (vanilla)
// Shivas Guard
-- Cooldown reduced from 65 to 30 (vanilla)

1.18k
All Maps:
-- Added two rune spots to the river to encourage movement (yes, that means 4 runes)
-- Removed some trees from top lane to help keep creeps from getting stuck
-- Widened some ramps
-- Upgraded tier 4 towers to not suck

1.18i
Items:
// New weapon: Wasp
-- Made from combining a butterfly, a crystalis, and a recipe
-- 30 Agility, 60 damage, 35% Evasion, 30 Attack Speed, 20% crit chance for 1.75x damage
-- Active Ability: Flight. Trades evasion for 20% bonus movement speed and flying movement for 8 seconds.

Heroes:
// Tidehunter
-- Gush reverted to vanilla so that it works with Aghanim's Scepter
-- Gush damage increased to 110/220/330/440
-- Gush manacost reduced from 120 to 90/100/110/120
-- Gush scepter aoe increased from 240 to 240/280/320/360
-- Reduced Ravage cooldown from 150 to 150/125/100
-- Anchor Smash damage increased from 75/125/175/225 to 100/150/200/250

// Venomancer
-- Venomous Gale cooldown reduced from 21/20/19/18 to 15
-- Poison Sting duration reduced from 6/9/12/15 to 3/4/5/6
-- Poison Sting damage per second increased from 6/12/18/24 to 10/20/30/40

1.18h
Items:
// Vladmir's Cuirass 2
-- Yet another attempted fix. Things are weird, because Valve changed some functions.

1.18g
Heroes:
// Witch Doctor
-- Death Ward bounces against all enemy units

1.18f
Heroes:
// Beastmaster
-- Call of the Wild now properly skills both together
-- Call of the Wild summons the proper boar and hawk at each level
-- Hawk now has properly working lightning at all levels

// Pugna
-- Fixed tooltip in ward attack rate

// Venomancer
-- Fixed Plague Ward tooltip

Items:
// Vladmir's Cuirass 2
-- Lifesteal no longer works on buildings

1.18e
// Items
-- Fixes to Vladmir's Cuirass
-- Fixes to a few abilities (such as Bounty Hunter's shuriken toss) that were broken when Valve removed mechanical unit distinction

1.18d
// Items
-- Desolator 2 recipe fixed
-- Fixes to Vladmir's Cuirass

1.18c
// General
-- Standardized melee attack range of creeps to 150
-- Increased maximum level to 35 (with 10 more levels of stat increases)

Heroes:
// Slark
-- Essence Shift reworked to always give 3 agility for 5/10/15/20 seconds

// Venomancer
-- Venomous Gale reverted to vanilla except for impact damage, which remains 100 at all levels
-- Poison Sting reverted to vanilla
-- Poisonous Gale damage reverted to normal
-- Poisonous Gale cooldown reduced to 140/115/90
-- Poisonous Gale scepter cooldown reduced to 110/80/50

// Items
-- Lithe boots removed for pressing ceremonial reasons
-- Added Desolator 2 from Year Beast Event (upgrade from desolator)
-- Phase Boots reworked
--- Recipe now requires brown boots, blades of attack, chain mail, stout shield, gloves of attack
--- Phase Boots now also grants 20 attack speed, 5 armor, and 16/8 damage block
--- New Phase Boots work with Meepo

// 1st Wave
-- Reduced zombie hitpoints from 680 to 480
-- Reduced hitpoints of all mech units
-- Increased bounty for skeletons
-- Reduced corpselord melee damage
-- Reduced attack speed for smaller spiders
-- Greatly increased damage for larger spiders

// 4th Wave
-- Greatly increased movement speed of wolves

// 5th Wave
-- Increased movement speed of all units
-- Ghost boss now uses flying movement

// 6th Wave
-- Reduced armor of troll healers
-- Standardized movement speeds of all units

// 7th Wave
-- Biggest Spookiest Meme now has flying movement

1.18b
// 1st Wave
-- Upgraded Wild Beast to mini-boss status
-- Wild Beast will now spawn only once, in a random lane

// Phantom Assassin
-- Fixed True Strike on Stifling Dagger
-- Stifling Dagger radius is now 200 at all levels
-- Stifling Dagger deals same damage as vanilla