Factory Legacy: Idle Empire
Grow a small workshop into a factory empire across five eras
- Android
- iOS
Merge matching pieces and rebuild a storybook kingdom, district by district
Merge Kingdom: Merge & Build is a merge puzzle and kingdom-building game by Rui Codex for Android. Players drag two matching pieces together to make one of the next tier, then deliver them to building projects that restore six districts of a run-down kingdom. It needs no account and is free to play, with ads and optional in-app purchases.
Scroll sideways or use the arrow keys.
Stone, timber, grain, jewels and more, each with its own generator and a top tier to reach.
Five projects per district, from the Village Square to the Royal Castle.
Upgrade generators so they drop better pieces, and keep spare pieces in the Storehouse.
Bakers, knights, jewellers and a princess pay in crowns, gems and experience.
Daily missions, a weekly chest and the Weekend Fair with its own ribbons.
Long-term goals and a leaderboard of kingdom renown.
Progress is saved on your device, and rewarded videos are always optional.
The kingdom has seen better days, and Pip, a small dragon in a big hard hat, is waiting for a builder. On the board, two matching pieces dragged together become one piece of the next tier: stone becomes brick becomes cut stone, a seed grows into a harvest and a nugget into a jewel. Eight resource chains each have their own generator and a top tier worth reaching.
The pieces go to work in six districts with five projects each, from the Village Square and Millbrook Fields to the Jewel Market and the Royal Castle. Deliver what a project asks for and the building rises in the district scene. In the workshop, generators are upgraded to drop better pieces, the Storehouse keeps pieces for later, and bakers, knights, jewellers and a princess bring orders that pay in crowns, gems and experience.
There is something to do every day: daily rewards and missions, a weekly chest, the Weekend Fair with its own ribbons, achievements and a leaderboard of kingdom renown. Energy refills over time and progress is saved on the device, with no account or sign-in. Merge Kingdom is free with ads; rewarded videos are always optional, and an optional Royal Pass makes energy refill twice as fast and removes forced ads.
Players who enjoy relaxed merge puzzles and watching a place come back to life, and anyone who likes short daily sessions with a long-term building goal.
Watch the trailer
The video loads from YouTube, in privacy-enhanced mode, only after you press play.
We design, build and publish our own apps with the same engineering we put into client software.
Built in Flutter (Dart) with local SQLite storage, so progress stays on the device. Ads run through Google AdMob with a consent choice where the law requires it, purchases through Google Play Billing, and anonymous usage analytics go to a self-hosted PostHog server and can be switched off in Settings. The game is localised into nine languages.
Yes. Merge Kingdom is free to download and play. It shows ads, and optional in-app purchases include a Royal Pass that makes energy refill twice as fast and removes forced ads; every price is shown in your own currency before you buy.
Yes, through Google AdMob, with a consent choice where the law requires it. Rewarded videos are always optional, and the optional Royal Pass removes forced ads.
No. There is no account and no sign-in, and your progress is saved on your device.
Energy refills over time, so you can come back later and carry on building.
Not at the moment. Merge Kingdom is published on Google Play for Android phones and tablets; there is no App Store version yet.
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Rui Codex builds mobile apps, web platforms and integrations for businesses in Belgium and across the EU.
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