This MEGA update is a free upgrade to the base Son of a Witch game. The update will is free for existing players, but the game price is likely to go up mid-March, so grab it while it's hot. This update is the biggest update to the game so far. It contains new hero, level, enemies, bosses, weapons, items, pets, quests and challenges, potions, magic scrolls, achievements. Here's the full list of new features, changes to existing features and bug fixes:

1. Heroes

• new hero: Lich. Undead, uses health energy to cast spells instead of mana. Can heal with mana gaining items or pets.
• Rogue Hero starts with pickpocket and speed buff effect
• Rogue hero magic key costs 1 mana, and can unlock boss room doors from the outside

2. Levels:

• new level Hell with new music, thrist effect and 26 new room layouts
• special room: minotaur labyrinth, gives access to the Lich hero
• special room: pentagram, needs donation of mana, health rune, gold and king scepter to enter hell
• special room: forest in ice level where you play hide and seek with Amanda
• special room: prison surgeon where you can donate health for gold
• special room: knife avoiding twins challenge in the desert
• special room: treasure challenge with multiple bushidos in the desert
• special room: fishing with bow and arrows in hell
• new object: Crystal Sphere - protects demonic enemies and blocks magic scrolls until destroyed
• new object: Lava Pit - petrifies players standing over it when it spits lava
• new object: Minotaur Statue - teleport to the start of the level
• new object: Bag Statue - players can now transfer gold coins amongst each other
• hell shops have new type of protection and require mana to buy items
• new treasure room in the catacombs and the desert
• required distance for the second jump in the Long Jump quest reduced to 80
• in hard mode the evil princess has become the queen and has strong guard in the throne room

3. Bosses:

• New boss: Demon Legion - big demons spawning unless you kill them all once
• New boss: Matilda - a huge witch that creates traps for players
• New boss. Ghost of Rhadamanthus - shoots many orbs and buffs his minions with random effects
• New boss: Demon Lord - fight in active volcano arena with lava petrifying players
• Ice dragon sometimes shows up on the battlements
• Elephant boss knocks down units when walking across the screen

4. Enemies:

• New: Imp - standard melee warrior, immune to fire and petrification
• New: Familiar - infernal mage can block your mana usage
• New: Fiend - quick with poisoned swordes and abilit to teleport behind your back
• New: Succubuss - shoots orbs and cheers at players with a beer, reversing their controls
• Newy: Efreet - flies around and spits very flammable fireballs
• enemies in the old catacombs no longer have huge HP in hard mode
• Bandits in the dungeon sometimes carry flaming swords

5. Weapons

• new weapon: Spellbinder - shoot orbs and block enemy mana usage
• new weapon: Magic Crossbow - shoots arrows and creates gold arrows using mana
• new weapon: Blacksmith's Hammer - throw at enemies and smelt weapons into shields
• new weapon: Overlord Staff - give random positive effects to self and allies
• new weapon: Blade of Light - triple damage vs undead and demons
• new weapon: Hypnosis Staff - turn non-boss enemies against each other
• new weapon: Brutus Gladius - a sword with high backstab damage
• Increased combo timer for the Barbarian Axe to 3 seconds
• Increased base damage for Ice Bow to 50

6. Items

• new item: Homing orbs - chance for magic orbs to auto-target enemies
• mew item: Magic Ice Bottle - use mana to create ice arrows
• new item: Four-leaf Clover - increased double damage chance
• new item: Holy Grail - Speed UP, Health UP, Magic/melee/archery UP
• new item: Faustian Ring - increase melee/magic/archery for 20 health
• new item: Minotaur Figurine - teleport to avoid death
• new item: Honey Jar - temporary speed up when you get hit
• new item: Stone Cross - double damage vs demons and undead
• new item: Hourglass - speed down, melee/archery/magic increase
• new item: Chili Pepper - enemies burn when they hit you
• new item: Wizard's Amulet - get 1 extra mana when entering new rooms
• new item: Claw Hammer - get coins when barrels break
• new item: Cooper's Ring - get mana when barrels break
• new item: Phylira's Necklace - break barrels to get armor points
• new item: wine - reduced thirst effect
• new item: Lich Ring - full heal after boss fight
• new item: Scales of Balance - increased damage when hungry, thristy or poisoned
• new item: pair of heart-shaped earrings - double healing effects
• reduced mana cost for Rogue's Magic Keyring to 1 so you can sneak around the levels freely
• Silver coin teleport out of old catacombs is now allowed
• Alchemist's Visor now protects from Santa's exploding presents as well

7. Potions

• New potion: Blood is Magic - lose all HP, get 3 mana
• New potion: Blood donor - turns current HP into gold
• New potion: Ironclad - increased damage scaling with armor
• Extravagance spends coins only when you enter new rooms
• Pickpocket effect now gives coins on room entry
• Bugfix: Dragonfire potion would remove arrow damage multiplying upgrades

8. Magic Scrolls

• New scroll: Summon Demon - all enemies attack it at once
• New scroll: Mark of the Beast - everyone loses 666 HP
• New scroll: Hypnotize Minions - enemies attack each other
• Added more units and bosses to Gamble scroll rotation.
• Duplicating weapons now clones damage, range, arrow speed upgrades as well.

9. Pets:

• New pet: Koala - a free item in every shop
• New pet: Panda - fetches gold coins and food
• New pet: Skunk - sets enemies on fire
• New pet: Sabertooth Tiger - gives +1 shield after every battle
• New pet: Squid - gives random positive effect after every battle
• Whale pet gives you a Kindling upgrade once a campfire stops burning
• Penguin pet no longer tries to attack enemies who have freeze immunity
• Snake pet no longer attacks enemies who have poison immunity

10. Other new features:

• new main menu graphics and music
• 27 new achievements
• You can now hold the drop button to drop the whole stack of items (arrows, keys, etc.)
• tracking win/lose streak for regular game and hard mode.
• allow entering any text as level generator seed (it gets converted into valid seed)
• now you can drop gold to double it with a scroll, or heal via gold diet
• Tar of Akhal picture shown in the final mom dialogue
• show the exact speed increase over speed buff status icon
• added option to reset all controllers to default settings
• allow binding Stomp attack to a separate button
• optional setting to shoot orbs using the regular attack button

11. Fixes:

• Allowed using ranged weapons for the Goliath achievement
• fixed Paladin to do double damage to undead with ranged weapons as well
• fixed a bug where ranged enemies would try to hit the Turtle pet endlessly
• fixed a bug when some monsters would get stuck attacking Turtle pet forever
• fixed a bug where the dialogue would pop up without key/button to continue the talk.
• fixed a bug where Undead Archer was unable to animate other undead sometimes
• fixed a bug with raised undead Archers always shooting arrows to the left
• prevent players getting stuck when hedgehog pet blocks the rolling spiked balls
• Vampire Slayer NPC now says Thank you when her quest is done
• achievement animations keeps working if you go from game into the main menu
• prevent raising petrified undead
• remove Confusion and Peace effect when undead unit dies
• added sound effect when some action fails (no money to buy stuff, etc.)
• imprved camera controls and thus enabled Baseball Quest for players with screens below 1680x900 pixels
• imprved camera controls and thus enabled Hornet Quest for players with 720p screens
• Message text for some actions would be hidden behind player status effects. Moved them above when status effects icon is visible.
• added statue players can use to teleport if they get stuck with dead player in co-op (gold shop, alchemist quest, treasure rooms, etc.)
• The final portal now shows that hell level is beyond instead of ice level
• allow re-binding strong and special attack to the same button
• fixed problem with minimizing game window on macOS in fullscreen mode

Steam version (PC,Mac,Linux) specific changes:

• added Steam leaderboard for the Endless arena
• you can now see the daily challenge rankings for friends only
• when some actions failed for a network guest, the reason would show on network host screen instead
• fixed netcode bug where some actions would fail without any notice text
• just minimize instead of closing the game when opening game's Steam page
• prevent mouse clicks when way outside of menu items in the main menu
• press F1 twice to see the progress for achievement counters