Idle castle defense game for mobile

Days Bygone - Castle Defense is a free action video game that was developed by Frivolition for mobile devices. It is an idle game that revolves around castle defense. In it, players will fight off endless waves of enemies as they continually upgrade their defenses and call the aid of heroes in battle.

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Similar to Zombie Idle Defense, players will be in charge of defending their base in Days Bygone - Castle Defense. They will need to accumulate gold and elixirs to unlock spells and weapons to help them fight incoming enemies that will gradually increase in numbers and strength.

How do I play Days Bygone - Castle Defense?

Mobile idle games have often featured simple controls and gameplay that are easy to learn and Days Bygone - Castle Defense is no different in that regard. The game utilizes a “Tap to attack” mechanic. The faster you tap your screen, the more you'll be able to fire off. As you progress, you'll collect gold and elixirs, which you can use to upgrade your castle with spellsskills, and even stat bonuses.

This game features plenty of upgrade options to choose from. There more than 8 stat upgrades and more than 20 weapons to boost your castle's defenses. In addition, you can unlock 15 spells and 25 skills that you can utilize. As mentioned earlier, you can also call on the help of heroes—and there are more than 20 of them for you to summon in battle.

Then there's the multiplayer aspect of the game that allows you to clash with other players or band together with them to form guilds. While the gameplay is simple and offers plenty of customization, it can get repetitive after a while. Given that it's free-to-play, there are various ads that will appear. The nice thing about them, though is that they're not intrusive like other games and you even get rewards if you finish viewing them.

A great castle defense game

All in all, Days Bygone - Castle Defense is one of the better idle castle defense games that are available for mobile right now. The gameplay is simple and there are plenty of upgrades and customization options available to you. The ads don't get in the way of playing and even rewards you for watching them. It's a solid game overall and worth a look.

  • Pros

    • Simple controls
    • Plenty of upgrades and customization options
    • Ads give out rewards for complete watching them
  • Cons

    • Repetitive gameplay
 0/8

App specs

  • License

    Free

  • Version

    2.8.0
  • Latest update

  • Platform

    Android

    Other platforms (1)
  • OS

    Android 15.0

  • Language

    English

  • Downloads

    861

    Last month's downloads

    • 69
  • Size

    94.05 MB

  • Developer

  • Download Options

    APK, Google Play

  • Filename

    com.frivolition.daysbygone_2.8.0.xapk

Also available in other platforms

Program available in other languages



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Is Days Bygone - Castle Defense safe?

100/100

Score result: Clean

This file passed a comprehensive security scan using VirusTotal technology. It is safe to download.

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Scan Info

Last scan
Thursday, February 12, 2026
Scan provider
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File Integrity

File
com.frivolition.daysbygone_2.8.0.xapk
SHA256
22d12e48c9d81fde0d26e3e7132b533fb1daacec7d0db2bbe0150e7b2fe938ed
SHA1
7973247c0c19e8f38d42309fbe0cc12c6ab195a5

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Days Bygone - Castle Defense has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware. For more information, visit our Security and Trust Center