NecroMerger - Idle Merge Game

Contains adsIn-app purchases
4.7
65.2K reviews
1M+
Downloads
Content rating
Everyone
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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.
Updated on
Apr 05, 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

4.7
63K reviews
Ms Eevee
November 7, 2025
Great game, generally I don't like idle games but this one is a lot of fun. You don't have to wait too long befor you can do more and their's different events that come and go that you can do a lot with while waiting for the main to recharge. EDIT: I'm owed 2,688 gems but the offer wall can't fix it. EDIT: same problem again. This time I'm owed 3,812. EDIT: both times Grumpy Rino gave me the gems, offer wall never was able to fix it. but now they're saying they won't do it again.
31 people found this review helpful
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DeWitt Powers
November 19, 2024
Decent casual game. But I have gotten pretty bored with it about halfway through progression. The ads are way too much though. I know you don't "have to" watch them, but you kind of do or else you can only play 1/4 as much and will miss all of the timed events. The quick ads are pretty reasonable. The minute+ ads that make you wait to tap 3 different X's and still take over your phone to open the app store are overkill. *and now I'm getting the ads that won't close or give rewards. One star.
78 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!
80 people found this review helpful
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What’s new

+ Decorations now give twice as many runes.
+ Added new "Starting Rune" hacks to the Hacker.
+ Events now cool down in a week instead of 10 days.
+ New limited time egg skin.
+ New stuff for lvl 100+ including new station, new feat, new minion and other changes.