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Idle Hero TD - Tower Defense RPG

Idle Hero TD - Tower Defense RPG

Endless Idle Tower Defense with deep strategy and RPG progression and combat mechanics. Recruit, upgrade, and position powerful fantasy heroes, discover game-changing synergies, and survive infinite monster waves. Grow stronger every run with literally millions of upgrades and endless auto battles.

Released May 3, 2024 Developer Swell Games LLC Platforms Windows · Mac Early AccessStrategyTower DefenseIdlerIncremental
View on Steam ↗ Free (US · as of 2026-09-25)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-25.

82.9%positive1,319 reviews
Recommended · 17 found this helpful

“Game is free. And it's fine. It's also free - but it reeeally wants your money. Your acceleration could be so much faster if you just microtransact once. Or twice. You don't have to, of course - because it's free - but think of all the fun you COULD be having if you…”

— a player, Steam review · 20 hrs played
Recommended · 1 found this helpful

“scratch my optimization urges, cant really lose at the game, so it satisfies some trait of personality.”

— a player, Steam review · 3,879 hrs played
Not recommended · 11 found this helpful

“If I'm being honest, I rather just buy bloons TD either 5 or 6 and play that instead.”

— a player, Steam review · 2 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-08 via SteamCharts.

2,143all-time peak
0 1k 2k 2025 2026 1.8k avg · May 2026

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.

45achievements
7.9%median completion
0.9%rarest: PvP Boss Damage III
34.4% of players 30.3% of players 28.9% of players 21.0% of players 19.5% of players 19.4% of players 19.4% of players 17.6% of players 15.4% of players 15.3% of players 14.6% of players 13.4% of players 13.0% of players 12.2% of players 11.9% of players 11.1% of players 9.9% of players 9.4% of players 9.0% of players 8.5% of players 8.3% of players 8.1% of players 7.9% of players 7.5% of players 7.2% of players 6.7% of players 5.5% of players 4.3% of players 3.8% of players 3.6% of players 3.4% of players 2.5% of players 2.1% of players 2.0% of players 2.0% of players 1.9% of players 1.8% of players 1.7% of players 1.7% of players 1.6% of players 1.3% of players 1.2% of players 1.0% of players 1.0% of players 0.9% of players 34.4% 0% most earned rarest
Almost everyone has
34.4%Synergies I — Achieve 10 active synergies at once.
30.3%Hero Unlocks I — Unlock 15 heroes.
28.9%Highest Wave I — Reach wave 250.
Rarest badges of honor
0.9%PvP Boss Damage III — Deal 100m damage to the PvP Immortal Boss.
1.0%Supreme Ultimus — Kill 100 Supreme Ultimus bosses.
1.0%Skill Mastery III — Reach 125 combined total Skill Mastery levels.

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Sep 25, 2026
Update v16.2 - Master League II, End-game Upgrades, and Balance Improvements

New Content: Master League II: players in the Master League for the PvP Immortal Boss can get promoted to Master League II by dealing enough damage during the event. This league has the same requireme

Sep 16, 2026
Update v16.1 - Runemaster Boss, Master Runes, and Master League PvP

New Content: Runemaster Boss: a new Ultra Boss that is unlocked at wave 45k. Featuring a few new challenging mechanics, killing this boss will reward Master Runes. Master League PvP Boss: enter this l

Aug 24, 2026
Patch v16.03 - Event and Premium Buffs

Changes: The Damage, Kill Gold, and Skill Power limited-time event bonuses, as well as the Damage and Gold premium purchases in the Store (Combat Bundle), now scale with your highest wave (+100% every

Aug 10, 2026
Patch v16.01 - Automation Balance Improvements

New Content: New Tournament upgrade to reduce Automation upgrade times. Changes: Reduced Automation upgrade times for the first 5 levels of each Stat Boost upgrade (damage, gold, energy, and exp) to h

Aug 03, 2026
Update v16.0 - Language Localization and Automation Improvements

New Content: You can now play the game in up to 8 different languages (and more are coming soon)! Change your language selection in the Settings menu to experience the game in your native language. Ad

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-25.

GenresAction, Casual, Indie, RPG, Strategy, Free To Play, Early Access
Player tagsEarly Access · Strategy · Tower Defense · Idler · Incremental · Free to Play · Auto Battler · Time Management · Strategy RPG · Simulation · Automation · Tactical (Steam store community voting)
FeaturesSingle-player · Steam Achievements · In-App Purchases · Family Sharing
LanguagesEnglish * , French * , German * , Spanish - Spain * , Japanese * , Korean * , Portuguese - Brazil * , Simplified Chinese * *
Achievements45
Official sitehttps://www.swellgames.org/
Minimum system requirements (PC)

Minimum: OS *: Windows 7 and above Processor: 1Ghz or faster processor Memory: 2 GB RAM Storage: 250 MB available space