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Defly.io

Fly a helicopter, wall off territory with towers, then defend the shape you just drew from everybody else.

Opens in a new tab. We do not control this site and it may have changed since we catalogued it.

How to get the most from it

Defly.io sits in Tower Defence under Play, filed as coffee break.

  • Set aside five to fifteen minutes and give it your proper attention.
  • Use a laptop or desktop computer — we file it as desktop only.
  • It works with the sound off, so it is fine on a train or in a quiet office.
  • No account needed — you can start without signing up.
  • Go in expecting something clever and competitive.

About this category: Place things, upgrade things, watch a wave break against them. The most satisfying genre for people who like being right in advance.

Good for

  • Filling a coffee break properly
  • Being impressed by a clever idea
  • Chasing a better score
  • A quiet break at your desk
  • Trying it with zero commitment

Defly.io: quick answers

Is Defly.io free?

Yes. Defly.io is free to use and needs no account.

Do I need an account to use Defly.io?

No. You can use Defly.io without signing up for anything.

Does Defly.io work on a phone?

Not well. We file Defly.io as desktop only, so open it on a laptop or desktop computer.

Is Defly.io safe for work?

Yes, we file it as safe for work. It also works muted.

How long does Defly.io take?

We file it as "Coffee break": Five to fifteen minutes of proper attention.

More in Tower Defence

All 15 in Tower Defence
  • The 2007 original that turned maze building into a genre, played across a desktop with the icons still sitting on it.

    • 10 min
    • Desktop
  • Numbers-heavy tower defence with endless mode, research trees and the general energy of a very well-kept spreadsheet.

    • 1 hr+
    • Desktop
  • The one most people name as the best tower defence: four tower types, hero units and levels that reward replanning.

    • 10 min
    • Desktop
  • Factory building crossed with tower defence: conveyor belts feed the guns, and the guns hold the line while you fix the belts.

    • 1 hr+
    • Desktop

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