Grid was a smooth-domed Xenomorph Drone spawned during the ill-fated Weyland expedition to Bouvetoya. Grid was responsible for killing the Predator Scar's brothers and clanmates Chopper and Celtic, and was able to escape being shot by Scar's plasma caster attacks. Grid helped free the Queen by cutting her open and allowing her acidic blood to burn away the chains that confined her. This shows the Xenomorphs' intelligence.
After easily stalling and impaling a distracted Chopper who was attempting to kill Alexa Woods, Grid gains the attention of Celtic—who becomes enraged after seeing his brother killed by the Xenomorph. A long engagement of single combat ensues between the two; during the battle the Xenomorph is caught in a net shot by Celtic, which slowly tightens around its victim, with the Yautja appearing to have a slight advantage. But, due to the Xenomorph's acidic blood, it escapes, pins Celtic, and dispatches him with a headbite. Now sporting a grid-like lining across its body, the Xenomorph earns its namesake.
Grid then begins to stalk the remaining Yautja, Scar. Grid and several other Xenomorphs locate Scar mere moments after he was granted a plasma caster by the human Alexa Woods. As Scar began dispatching multiple Xenomorphs, Grid hid in the shadows to avoid the plasma blasts. When the Queen ordered them to retreat, Grid and the other Xenomorphs returned to the Queen and released her by wounding her, allowing her acid blood to burn through the chains that confined her.
When Scar and Alexa Woods attempted to escape the pyramid, Grid chased them in the ice tunnel, but was too slow and ends up incinerated, crushed and buried by the explosion of the self-destruct device.
Grid's nickname is derived from the grid-like scars it got after being caught in Celtic's net.
- Referred to as the "Alpha-alien" in Marc Cerasini's novelization, Grid is possibly some sort of leader to the Xenomorphs in the pyramid, as it seems smarter or more tactically adept than the other Drones.
- Grid is a multiplayer skin in the 2010 video game Aliens vs. Predator, under the name "Nethead". It is unlocked when players reach Rank 34.
- Grid's tail seems to be fully healed after its fight with Celtic, as during the fight Celtic severs the blade of its tail.
- The Antarctica Queen, the Earth Predalien and Grid are the only Xenomorphs that have killed a Predator on film.