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 Timeline of the Half-Life universe
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{{Information
|attention={{Cleanup image}}CategoryImages for clean up (Half-Life)
|description=HECU grunts with M4s.
|source=''Half-Life'' Beta
|author=
|filespecs=
|licensing={{Gamescreenshot}}
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|cat artist=
|cat subject=CategoryHECU imagesCategoryMP5 imagesCategoryM4 images
|cat type=CategoryHalf-Life Beta screenshots
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{{Article|Image}}
{{Information
|attention=
|description=Early Headcrab jumping.
|source=''Half-Life'' Beta
|author=
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|licensing={{Gamescreenshot}}
|other versions=
|cat artist=
|cat subject=CategoryStandard Headcrab imagesCategoryBlack Mesa Research Facility images
|cat type=CategoryHalf-Life Beta screenshotsCategoryOfficial screenshots
}}