Official + needs verification The archive listing confirms the Expansion exists and is free; its specific new content is not documented there.

Bloons TD 4 Expansion — What Is It?

Bloons TD 4 Expansion is a content expansion of Bloons TD 4. Here is exactly what is verified about it — and what is not.

Verified

It exists. The official Ninja Kiwi web archive lists Bloons TD 4 Expansion as a playable game alongside Bloons TD 4. (official, verified)
It is free. It is part of the free official archive, and by extension of the free Ninja Kiwi Archive collection on Steam. (official)

Not yet verified

The specific towers, maps or modes added by the expansion. The archive listing does not spell them out, and we did not find a reachable first-party source at check time — this page will be updated when that changes.

Play it

Free · Official web archive or Steam (verified)

Open the official archive Steam version

New to the game? Start with the beginner guide.