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Steam News15 June 202620d ago

Patch v15.21 - Bug Fixes and Balance Improvements

Changes: Reduced the 2x Reward Procs on Supreme Ultimus challenge requirements from 35 to 25.

Full notes

Full Idle Hero TD - Tower Defense update

Read the full published notes in a cleaner layout. The original post stays linked below.

What changed

8 fixes0 additions3 changes0 removals
  • Events
  • Store
  • Server
  • Gameplay
  • Fixes
  • Balance
changedReduced the 2x Reward Procs on Supreme Ultimus challenge requirements from 35 to 25.
changedChanged the description of the “Purchase all Leaderboard Icons” challenge to just "Purchase Leaderboard Icons" because you don't need all of them (just 110 out of 114).
changedChanged the server save/load system to avoid future issues related to file sizes and server limits.
fixedFixed bug with the average super/ultra energy calculations. This should boost most of your energy gains from skills, spells, mimics, and power mages (but wave income is not affected).
fixedFixed bug with skill cooldowns increasing, rather than decreasing, if your synergy or milestone bonuses were too high.
fixedFixed bug where the 10m kills on all melee heroes challenge was not applying the +250% bonus damage reward correctly.
the 2x Reward Procs on Supreme Ultimus challenge requirements3525the 2x Reward Procs on Supreme Ultimus challenge requirements decreased, nerf

Idle Hero TD - Tower Defense changes

changedReduced the 2x Reward Procs on Supreme Ultimus challenge requirements from 35 to 25.
changedChanged the description of the “Purchase all Leaderboard Icons” challenge to just "Purchase Leaderboard Icons" because you don't need all of them (just 110 out of 114).
changedChanged the server save/load system to avoid future issues related to file sizes and server limits.
fixedFixed bug with the average super/ultra energy calculations. This should boost most of your energy gains from skills, spells, mimics, and power mages (but wave income is not affected).
fixedFixed bug with skill cooldowns increasing, rather than decreasing, if your synergy or milestone bonuses were too high.

Changes:

  • Reduced the 2x Reward Procs on Supreme Ultimus challenge requirements from 35 to 25.

  • Changed the description of the “Purchase all Leaderboard Icons” challenge to just "Purchase Leaderboard Icons" because you don't need all of them (just 110 out of 114).

  • Changed the server save/load system to avoid future issues related to file sizes and server limits.

Bug Fixes:

  • Fixed bug with the average super/ultra energy calculations. This should boost most of your energy gains from skills, spells, mimics, and power mages (but wave income is not affected).

  • Fixed bug with skill cooldowns increasing, rather than decreasing, if your synergy or milestone bonuses were too high.

  • Fixed bug where the 10m kills on all melee heroes challenge was not applying the +250% bonus damage reward correctly.

  • Fixed bug where the Mimic Prestige Bonus from the new leaderboard icon was not applying the bonus correctly.

  • Fixed bug where your best Immortal Boss damage was not tracked correctly if you went down a league.

  • Fixed various other minor issues related to the new Challenges.

  • Fixed bug related to Daily Gift rune rewards.

  • Fixed various minor UI issues.

Source

Steam News / 15 June 2026

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