NecroMerger - Idle Merge Game

Contains adsIn-app purchases
4.7
65K 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
Feb 16, 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
62.9K 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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Vandreal Conley
November 10, 2025
Honestly, this is usually a great game. But, of late, the ad dependent items in the game (yes, those are built in) are not even working. You tap on the thing you're supposed to tap on, and nothing happens. At this point, it's become game breaking. Edit: It's been a long time, and I've come back to check on the game, just to see if they fixed the issues from before, nope. This is an Ad dependant game, but they don't work. Dev(s) don't care if the mechanic is broken, they still get their money...
24 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.
77 people found this review helpful
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What’s new

+ 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+.