Orbital Obliteration

"Kill another player with the Orbital Cannon."

- In-game description

Orbital Obliteration is an achievement/trophy in Grand Theft Auto Online, added as part of GTA Online: The Doomsday Heist.

Acquisition
This achievement/trophy is unlocked after killing another player with the Orbital Cannon in a free roam session.

The Orbital Cannon costs $900,000 to install in a player's Facility. The first shot with the Cannon is free, then subsequent shots are priced at $500,000 for a manual shot and $750,000 for an automatic shot.