EntityQ16520269· pop 10· linked from 4 articlesHalf-LifeSign in to saveWikimedia disambiguation pageConnectionshalf-lifeEntityHalf-LifeEntityHalf-Life 2EntityHalf-LifeEntitybiological half-lifeEntityHalf-Life 2: Episode OneEntityHalf-Life: Blue ShiftEntityHalf-Life 2: Episode TwoEntityHalf-Life: AlyxEntityHalf-Life: Opposing ForceEntityHalf-Life 2: Lost CoastEntityHalf-Life: DecayEntityHalflifeEntityMedical InvestigationEntityOdyssey 5EntityLogan's RunEntity3Entityhalf-life of knowledgeEntityThe Autumn EffectEntityCopEntity