Two tower defenses, both called "6", both from studios that have been making them for over a decade. Bloons TD 6 (Ninja Kiwi, 2018) and Kingdom Rush 6: Genesis (Ironhide Game Studio, September 24, 2026) represent two different answers to what a tower defense should be, and comparing them honestly means showing both designs at their best.
The comparison
| Dimension | Bloons TD 6 | Kingdom Rush 6: Genesis |
|---|---|---|
| Developer | Ninja Kiwi (New Zealand) | Ironhide Game Studio (Uruguay) |
| Released | June 2018 (mobile), Dec 17, 2018 (Steam); eight years of updates | September 24, 2026, all platforms same day |
| Price | $6.99 mobile, $13.99 PC [official] | $6.99 mobile [partial, media], Steam price unannounced (checked 2026-09-14) [pending] |
| Platforms | 10 stores and subscriptions incl. Switch, PS4, Xbox, Netflix, Arcade | Steam (Windows, macOS), iOS, Android; no consoles |
| Tower placement | Free placement, anywhere terrain allows | Fixed strategic tower slots |
| Tower growth | 25 towers, 3 upgrade paths of 5 tiers each, chosen in-match | Towers plus a global upgrade tree between missions |
| Heroes | 17 available, exactly 1 per game, auto-leveling | 2 heroes per level with manual abilities |
| Spells | None as a separate system; tower abilities fill the role | 3 equippable spells: Reinforcements, Rain of Fire, Royal Edict |
| Multiplayer | 4-player co-op in every mode | Single-player |
| High-end challenge | CHIMPS ruleset, 7 boss events, Paragon Tier 6 towers | Iron difficulty across an 18-stage campaign |
| Art style | Bright 3D cartoon | Hand-painted 2.5D fantasy |
⚠️ Unconfirmed. KR6's Steam price and post-launch reception do not exist yet as of this page's check date. The table stays honest by marking those cells pending instead of filling them with guesses, and both wikis will update the same numbers on the same day after launch.
How to choose
- You want one game to live in, or you want to play with friends. BTD6: eight years of updates, 4-player co-op everywhere, and subscription routes (Netflix, Apple Arcade) if you already pay for them.
- You want a crafted campaign you finish. KR6: fixed tower slots and hero-and-spell control create a tactical "positions war" feel, with an 18-stage campaign and an Iron difficulty designed to be beaten, not farmed.
- You want both. They barely overlap in play style, and on mobile they cost the same $6.99 tier. The only real conflict is PC price, where BTD6's $13.99 is known and KR6's is not yet announced (full price page).
Where each one is weaker
Fairness cuts both ways. BTD6's eight years of systems (in-app purchases, event rotations, knowledge trees) give newcomers more to learn. KR6 launches with no console versions, no multiplayer and an unproven post-launch cadence, while BTD6 has shipped 56+ major updates. Neither weakness is a verdict; both are just facts to weigh.
FAQ
Is Kingdom Rush 6 related to Bloons TD 6?
No. They are from different studios in different countries with no shared history. The comparison exists because both are sixth-numbered tower defenses released into the same genre space; the within-series story is on the series timeline.
Which is better for a beginner?
Both teach well. BTD6's ladder eases you in with forgiving early maps; KR6's campaign is authored, so its early stages are tuned like a tutorial. Pick by which structure you prefer: sandbox ladder or authored campaign.
Can I play either one with friends?
Only BTD6 has multiplayer (4-player co-op). KR6 is single-player. If co-op is the requirement, the decision makes itself.