Final Boss is an achievement that requires the player to defeat all bosses 100 times and have a total of 5,000 boss kills.
Hardmode is not required, but hardmode kills do count as regular kills. If hardmode kills are used to unlock the Final Boss title but the player lacks 100 kills in normal mode for any boss, the achievement remains locked, although the title itself can still be worn.
Completing this achievement awards the Final Boss [Name] title.
- Before an update on 10 September 2018, this achievement had 75 RuneScore.