NecroMerger - Idle Merge Game

Contains adsIn-app purchases
68.3K reviews
Content rating
Everyone
1M+
Downloads
Content rating
Everyone
Mild Fantasy Violence
In-Game Purchases (Includes Random Items)
Learn more
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About this game

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 army of monsters (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 new abilities and spells.

Complete feats to unlock new stations and equipment… graves, altars, fridges and even a bathtub to hold excess slime. New stations will let you summon stronger (and even more tasty) minions. Manage your lair and monsters to maximize your resource generation.

NecroMerger is a whole new type of game that combines merge and idle mechanics with resource management to create something truly unique.

Grow Monsters
• 100+ minions to spawn and merge.
• Minions have unique abilities to manage (resource generation, damage, deliciousness).
• Create new Forgotten Minions by merging different types of minions together.
• Unlock powerful Legendary Minions with big benefits.

Expand your Lair
• Expand your lair. Unlock new equipment including; graves, altars and portals.
• Attract champions, merchants and thieves to your lair.
• Complete feats, master spells, brew potions.
• Use a unique prestige mechanic that takes you to unexpected places.

Events
• Take part in distinct repeatable events with special mechanics. You’ll battle your sister, keep bees and travel back in time.
• Head outside the lair to play seasonal events, whether that’s organising your own birthday party or playing Santa.
• Unlock unique skins and themes to change up your lair and its inhabitants.

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 the humour and inane chatter you’d expect of a Grumpy Rhino game.
Merge monsters to feed the Devourer in this idle merge game mashup!
Updated on
Aug 26, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Location, Personal info and 4 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

66K reviews
Raiden Lamothe
April 27, 2026
this idle game is AMAZING. if you want it as an idle game, thats what it is, if you want it as a constant action game, thats what it is. you play with materials, and if you play the right way it's really fun. now you would think its just another ad-filled idle game but, its actually not! ads are player decided, you can play the whole game without watching a single ad, and slightly faster level up, also the ad issue you see in 90% of the 1 star reviews is fixed
39 people found this review helpful
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Katelyn Gutierrez
April 14, 2026
I've spent more money on this game than any other mobile game because it is so, so fun, and even in the free version, the benefits are worth the ad every time. the styling is detailed, the random dialogue is funny, the music and sounds are perfect. If you like merge games, give it a try. it might surprise you.
27 people found this review helpful
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Marina Fernandez
December 22, 2024
I don't make reviews very often anymore. That being said, this game deserves all its flowers. The character design is charming, offering lots of different monsters to work at collecting to merge more monsters! As resources collect over time to build more monsters, you can ignore the game for as long as you'd like and come back. There's also seasonal events to encourage the player to play every day for limited edition items and gems/coins. Plus the music is fun to vibe to. Easy to pick up & play!
96 people found this review helpful
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What’s new

+ Changed the Throne's mechanics. The Throne is now free to build.
+ Updated some of the later game Feats.
+ Updated the graphical appearance of Timepieces.
+ Added some missing sound effects.
+ Fixed some bugs.
Content rating
Everyone
Mild Fantasy Violence
In-Game Purchases (Includes Random Items)
Learn more

App support

About the developer
GRUMPY RHINO GAMES LIMITED
support@grumpyrhino.com
Unit 405 Exmouth House, 3-11 Pine Street LONDON EC1R 0JH United Kingdom
+44 20 7953 2233

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