A classic and influential first-person shooter [[science fiction]] [[video game]] series developed by [[Valve Software]] and first released in 1998, with sequels made from 2004 to 2007.

Famous for being one of few mainstream, western made FPS game series that was popular in Japan. It is notable because [b]it introduced [[gameplay mechanics]] and immersive and [[realistic]] video game world design that has become the norm for most 3D FPS games up to this day[/b].

h4. Characters

* [[Gordon Freeman]]
* [[Alyx Vance]]
* [[G-Man]]
* [[Headcrab]]

h4. List of games

* [[Half-Life 1]]
** [[Half-Life: Blue Shift]]
** [[Half-Life: Opposing Force]]
** [[Half-Life: Decay]]
* [[Half-Life 2]]
* [[Half-Life 3]]
* [[Half-Life: Alyx]]

h4. External links
* Combine Overwiki: "Half-Life and Portal universe":[https://combineoverwiki.net/wiki/Half-Life_and_Portal_universe]
ハーフライフ Half-Life half-life HalfLife はーふらいふ