Grumpy Rhino Games is an independent mobile app developer based in the UK. Since 2015 we have specialised in mobile idle games and have launched a number of titles including Idle Apocalypse and Idle Mastermind. In 2022 we launched our first merge game - NecroMerger.

In most of our games you play as the bad guy, who is always flawed, sometimes sassy and - occasionally - endearing. We try to keep our games funny and light-hearted, with characters (usually monsters) chatting inanely being a staple in most of our titles. Our games have beautiful pixel art and 'banging' music so they're easy on the eye and ear. Most of our games are easy to get into but can take months (if not years) to complete. We aim to appeal to those of you who've never picked up an idle game and to those who've played hundreds.


Our games can be downloaded on both the Apple and Google Play app stores.