tf_logic_boss_battle
This entity is Obsolete. Its use is discouraged, and it may only exist/function in older engine branches.
This entity is not in the game by default, but got left over in the FGD.
This feature is not available anymore.
This feature is not available anymore.
tf_logic_boss_battle is a point entity available in 
Team Fortress 2. This was used to detect a Boss Battle map, a sub-gamemode for Raid mode, which is an early iteration of Mann vs. Machine. A well-built FGD entry of this entity is also left behind undisabled, misleading that its in a state of ready-to-use, when the majority of Raid's functionality (including its FGD entries) are not present anymore.
In code, it is represented by theCBossBattleLogicclass, defined in thetf_boss_battle_logic.cppfile.