This entity is present in Counter-Strike (including Condition Zero) since 2000.
For Half-Life, this entity was added in the 25th anniversary update from November 2023. This means that this entity will not spawn if the map is running of an older version of Half-Life (a warning in the console will be shown).
This entity is not present in other games/mods (unless said game/mod re-implement this entity through custom code).
Vehicle Name (target) - Name of func_vehicle to control.
Despite it's func_ name, it works more like trigger_*s where it defines an area of effect, is invisible, and is non-solid.