For ten points, identify this series of video games produced by Valve, which center on Black Mesa's alien-fighting physicist Gordon Freeman.
One game in this series intersperses developer commentary with a mission to destroy a monastery-based artillery launcher. The Seven Hour War is won by an army whose forces include Hunters and the Overwatch in this series, leading to the setup of a Breen-led government in City 17. In a recent installment, this series' protagonist befriends the (*) Combine-enslaved Vortigaunts, who heal Alyx Vance, and is employed by the mysterious G-Man. Three games in this series are included in The Orange Box, and the signature weapon of its protagonist is his crowbar. For ten points, identify this series of video games produced by Valve, which center on Black Mesa's alien-fighting physicist Gordon Freeman.
One game in this series intersperses developer commentary with a mission to destroy a monastery-based artillery launcher.
Half-Life (accept any specific Half-Life games) &lt;MS&gt;