Download this file:
https://www.dropbox.com/s/f1sec5edcvs5f9b/Cuphead_BossHPBars_by_KZ_v0.0.3.zip?dl=1

0. Unpack/extract the downloaded ZIP file somewhere, navigate into "steam\" folder there.
1. Open Steam, right-click on "Cuphead", click Properties,
select Tab "Local files" and click "Browse local files"
2. Copy "Cuphead_Data\" folder from mod's "steam\" folder INTO Cuphead's game folder
Confirm replace if asked.
3. It is STRONGLY recommended to make a backup copy of original "Assembly-CSharp.dll"
in "...\Cuphead_Data\Managed\" folder for easier "uninstall" process.


[DE-INSTALLATION]

Restore backup of "Assembly-CSharp.dll" or reinstall the game from installer for GoG
or run Verify Game Cache files for Steam.


[USAGE]

The HP bar for boss is always being displayed when you are in BOSS-type scene.