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Slay All Bosses: Idle cover

Slay All Bosses: Idle

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Slay All Bosses: Idle, is a short incremental RPG. Cut down waves of enemies, defeat powerful bosses, and rapidly grow stronger through character skill trees, weapon and skill upgrades, and equipped passive abilities, all on your path to becoming the ultimate hero.

Role-playing (RPG) Simulator Strategy Adventure
2026 27 achievements
27 achievements
Weapon Enhancer

Weapon Enhancer

93.9%

Purchase your first weapon stat upgrade.

Skill Enhancer

Skill Enhancer

93.4%

Purchase your first skill upgrade.

Goblin Chieftain Slain

Goblin Chieftain Slain

92.5%
Minotaurus Slain

Minotaurus Slain

88.2%
Elder Treant Slain

Elder Treant Slain

85.7%
Spirit Shadow Slain

Spirit Shadow Slain

83.2%
Jormungandr Slain

Jormungandr Slain

79.8%
Ancient Weapon Slain

Ancient Weapon Slain

76.0%
Kirin Slain

Kirin Slain

74.0%
Max Damage

Max Damage

72.5%

Deal 99999+ damage with a single attack.

Spectral Reaper Slain

Spectral Reaper Slain

72.3%
Demon Mantis Slain

Demon Mantis Slain

69.8%
Berserker Slain

Berserker Slain

67.9%
Chimera Slain

Chimera Slain

66.5%
Kaiju Slain

Kaiju Slain

65.5%
Goddess Slain

Goddess Slain

63.1%
Full Potential

Full Potential

59.5%

Complete any character's upgrade tree.

Xelzoros Slain

Xelzoros Slain

54.4%
Abaddon Slain

Abaddon Slain

49.6%
Sword Collector

Sword Collector

35.9%

Obtain all swords.

Staff Collector

Staff Collector

34.1%

Obtain all staves.

Master Swordsman

Master Swordsman

33.8%

Learn all the Swordmaster's skills.

Master Mage

Master Mage

32.4%

Learn all the Sorceress's skills.

Max Level

Max Level

30.4%

Reach level 50 with any character,

Ninja Weapon Collector

Ninja Weapon Collector

29.7%

Obtain all daggers and claws.

Master Shinobi

Master Shinobi

28.7%

Learn all the Assassin's skills.

Maximum Bonus

Maximum Bonus

25.6%

Level up every zone to their maximum level.

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