half_life_resource_pack-1.0.0-resourcepack-1.21.4.zip is a release file of the Minecraft resource pack Half life Black mesa guns and mobs, made for Minecraft 1.21.4. It was published on April 17, 2025 and is 0.3 MB in size. For the full description, screenshots and every other version, visit the Half life Black mesa guns and mobs resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.