For every successful hit with the Black Box, the Soldier is awarded health based on how much damage is dealt (up to 20 health for attacks over 90 damage). Hitting multiple enemies with a single rocket uses the total damage that rocket deals to calculate health gain. Health gained through Black Box hits cannot grant overheal. The Soldier does not receive health if the target is invulnerable to damage, such as a Scout under the effects of Bonk! Atomic Punch; however, health is still awarded if the target is a cloaked or disguised Spy. A successful hit does not remove the effects of fire, bleeding, Jarate, or Mad Milk on the player. Health gained is shown on the HUD.
September 30, 2010 Patch (
Mann-Conomy Update)
- The Black Box was added to the game.
October 8, 2010 Patch
January 7, 2011 Patch
February 14, 2011 Patch
- Fixed players getting set bonuses applied on tournament servers when the server is restricting the player's weapons using the item_whitelist.
- [Undocumented] Fixed players getting set bonuses applied on Medieval maps for items that are not allowed in medieval mode.
March 10, 2011 Patch (Shogun Pack)
- Updated model with optimizations and LODs.
March 11, 2011 Patch
- Fixed players getting a health bonus based on the weapon they're currently holding instead of the weapon that dealt the killing blow.
June 23, 2011 Patch
- [Undocumented] The Black Box was added to the crafting blueprint for the Liberty Launcher.
July 20, 2011 Patch
- [Undocumented] The Black Box was added to the crafting blueprint for the Cow Mangler 5000.
September 20, 2011 Patch
- [Undocumented] Added Strange quality.
April 17, 2012 Patch
- [Undocumented] The Black Box now grants health when striking a building.
April 27, 2012 Patch
- Fixed damage to buildings applying on-hit effects.
July 10, 2013 Patch
- Rocket explosions now use correct sound.
November 12, 2013 Patch
November 21, 2013 Patch (Two Cities Update)
December 20, 2013 Patch (Smissmas 2013)
- [Undocumented] Added Festive variant.
June 11, 2014 Patch
- Fixed reflected Black Box rockets not giving health to the Pyro.
June 18, 2014 Patch (Love & War Update)
- [Undocumented] Fixed the reload of Soldier primary weapons to show rockets in first person.
July 2, 2015 Patch #1 (Gun Mettle Update)
- Changed attributes:
- Changed +15 health on hit to +20 health on hit per attack.
- Changed how health on hit works for radius damage. Is now capped per attack and scales with total damage done relative to base damage. (i.e. doing 45 damage nets +10 health on hit as base damage is 90. Hitting 3 enemies for 45 each for a total of 135 damage only returns +20 health.)
July 28, 2016 Patch
- Adjusted Black Box reload animation to be slightly faster (now matches the default Rocket Launcher).
October 24, 2017 Patch
- Fixed the Festive Black Box not working for Black Box Contracts.
December 21, 2017 Patch (Smissmas 2017)
- Added Festivized variant.
- [Undocumented] Australium variant can now be Festivized.
January 5, 2023 Patch
- Fixed entities being considered static props after long server times
- Fixed rockets occasionally being solid