Global States are a Half-Life 2 map-wide system that decides whether a certain gameplay condition is met or not.
A Global State can have both, an enabled state and a counter.
The list below represents all global states used by Half-Life 2 and its episodes.
|antlion_allied||Antlions are player allies||Half-Life 2: enabled after you unlock the Pherliac Pods before you enter Nova Prospect.|
|suit_no_sprint||HEV Suit sprint function not yet enabled.||Half-Life 2: at the beginning of the game before the player has the HEV suit.|
|super_phys_gun||Super Gravity Gun is enabled.||Half-Life 2: when the player is in the citadel.|
|friendly_encounter||Friendly encounter sequence causing weapons to be lowered.||Half-Life 2, Episode 1, and Episode 2: whenever a friendly cutscene takes place (e.g. Black Mesa East meeting Barney and Eli, meeting the vorts when they heal Alyx)|
|gordon_invulnerable||All players are invulnerable.||Half-Life 2: beginning of the game on the train ride.|
|no_seagulls_on_jeep||Don't spawn seagulls on the jeep.||Half-Life 2: if the player leaves their jeep seagulls may spawn on it.|
|ep2_alyx_injured||Alyx is injured and cannot fight.||Episode 2: enabled before Alyx is healed by Vortigaunts|
|ep_alyx_darknessmode||Burning props emit light and zombies act like they are in darkness.||Episode 1: when Alyx and Gordon are sneaking in the tunnels with zombines|
|hunters_to_run_over||Hunters run over before they dodge.||Episode 2: during a fight with striders and hunters|
|citizens_passive||"Citizens are not player allies (cannot be commanded)." This has the same effect as gordon_precriminal but only for citizens.||Unused|