NecroMerger is a brilliant and darkly humorous mashup that proves the 'merge' genre still has plenty of room for innovation. Instead of merging cute flowers or gems, you play as the titular NecroMerger, summoning skeletons, zombies, and demons to feed to your insatiable pet, the Devourer. This twist on the mechanic is refreshing; every creature you merge serves a purpose, whether it’s generating resources like slime and mana or being a 'tasty' snack for your pet to help it grow.
The progression is expertly handled. As the Devourer grows, your lair expands, unlocking new 'stations' like graves and altars that let you summon even more powerful (and delicious) monsters. The game manages resource management beautifully, as you have to balance your limited lair space with the need to generate energy. With over 70 creatures to discover and the signature humor of Grumpy Rhino Games (creators of Idle Apocalypse), NecroMerger is a deeply engaging, months-long experience that is easily the best 'idle merge' game currently available.
Available on: iPhone, iPad, iPod
Version 1.76Thu Feb 19 2026
+ Added the Mech. This new Champion has a Damage Cap mechanic and drops Energy Cubes when beaten.
+ Added 4 new Relics. Also increased the Safe's max size.
+ Added page 6 of the Spell book (Note this page currently only has 4 spells)
+ Quite a lot of rebalancing and changes, especially at lvl 100+.
The Devourer is always hungry and it’s your job to feed it in this idle merge game mashup. Play as the NecroMerger and use dark magic to summon an array of creatures (skeletons, zombies, demons, banshees… the list goes on). Merge them from piddly little grunts into massive (and tasty) brutes, before feeding them to your ever hungry pet.
As you grow your Devourer you’ll attract the attention of merchants, champions and even rivals. Some can be useful, others must be fought… or fed to your insatiable pet. The bigger the Devourer grows the more your lair will expand and you’ll unlock powerful abilities and spells.
Complete tasks to unlock new stations and equipment… graves, altars, fridges and even a bathtub to hold excess slime. New stations will let you summon new, stronger (and even more tasty) creatures. Manage your lair and your underlings to maximize your resource generation.
NecroMerger is a whole new type of game, which combines merge and idle mechanics with resource management to create something truly unique.
Grow Monsters
+ 70+ creatures to spawn and merge.
+ Creatures have unique abilities to manage (resource generation, damage, deliciousness)
+ Legendary Creatures with massive benefits.
Expand your Lair
+ Expand your lair. Unlock new equipment including; graves, supply cupboards, lecterns.
+ Attract Champions, merchants and thieves to your lair.
+ Complete tasks, master spells, brew potions.
Idle Merge Mashup
+ A unique system of resource management.
+ Resources generate even when you’re offline.
+ Months of fun!
From the makers of Idle Apocalypse and Idle Mastermind, NecroMerger has all the humour and inane chatter you’d expect of a Grumpy Rhino Game.
Requires iOS 15.0 or later. Compatible with iPhone, iPad, and iPod touch.The Devourer is always hungry and it’s your job to feed it in this idle merge game mashup. Play as the NecroMerger and use dark magic to summon an array of creatures (skeletons, zombies, demons, banshees… the list goes on). Merge them from piddly little grunts into massive (and tasty) brutes, before feeding them to your ever hungry pet.
As you grow your Devourer you’ll attract the attention of merchants, champions and even rivals. Some can be useful, others must be fought… or fed to your insatiable pet. The bigger the Devourer grows the more your lair will expand and you’ll unlock powerful abilities and spells.
Complete tasks to unlock new stations and equipment… graves, altars, fridges and even a bathtub to hold excess slime. New stations will let you summon new, stronger (and even more tasty) creatures. Manage your lair and your underlings to maximize your resource generation.
NecroMerger is a whole new type of game, which combines merge and idle mechanics with resource management to create something truly unique.
Grow Monsters
+ 70+ creatures to spawn and merge.
+ Creatures have unique abilities to manage (resource generation, damage, deliciousness)
+ Legendary Creatures with massive benefits.
Expand your Lair
+ Expand your lair. Unlock new equipment including; graves, supply cupboards, lecterns.
+ Attract Champions, merchants and thieves to your lair.
+ Complete tasks, master spells, brew potions.
Idle Merge Mashup
+ A unique system of resource management.
+ Resources generate even when you’re offline.
+ Months of fun!
From the makers of Idle Apocalypse and Idle Mastermind, NecroMerger has all the humour and inane chatter you’d expect of a Grumpy Rhino Game.
















NecroMerger is a whole new type of game that combines merge and idle mechanics with deep resource management. As the NecroMerger, you use dark magic to summon skeletons, zombies, and demons. Merge them into massive brutes before feeding them to your pet, the Devourer. As your pet grows, you'll expand your lair, unlock powerful spells, and attract the attention of merchants and rivals. Manage graves, altars, and more to maximize your resource generation in this humor-filled monster-growing simulation.
Unique merge-to-feed gameplay mechanic
Over 70 diverse creatures to summon and merge
Deep lair expansion and equipment system
Offline resource generation and idle progress
Signature dark humor and engaging tasks
Don't feed every creature to the Devourer immediately. Some monsters produce essential resources like Slime or Mana while they are in your lair. Keep a few high-level producers on the board to speed up your summoning.
Complete 'Cravings' for the Devourer to earn fast progress and unlock new equipment like the Lectern or the Bathtub, which allow you to summon even more advanced creature types.
The main goal is to grow the Devourer by merging and feeding it monsters, which in turn unlocks more of your lair and new abilities.