Where do you find the LEAPER in Arc Raiders?
The LEAPER spawns on Dam Battlegrounds, The Spaceport, Buried City and The Blue Gate. Spawn points are irregular between raids, so treat the map below as patrol areas rather than fixed positions.

Massive, arachnid-like siege engine with heavy armor and gravity-defying leap ability. Can clear impossible gaps and reach high vantage points.
Fire is most effective. Additionally you can shoot into it's eye.

Landmarks and extractions on Dam Battlegrounds are shown above. Open the full Dam Battlegrounds map for loot containers and quest markers.
The LEAPER spawns on Dam Battlegrounds, The Spaceport, Buried City and The Blue Gate. Spawn points are irregular between raids, so treat the map below as patrol areas rather than fixed positions.
Fire is most effective. Additionally you can shoot into it's eye. It is rated critical threat, so engage it with a plan and an escape route.
The LEAPER drops Advanced ARC Powercell, ARC Alloy, ARC Circuitry, ARC Flex Rubber, ARC Motion Core, ARC Performance Steel, ARC Powercell, Explosive Compound, Leaper Pulse Unit and Mechanical Components.
Destroying the LEAPER awards 500 XP, and looting its wreck awards 500 XP.
Killing the LEAPER is worth 1000 XP and drops worth roughly 9,750 in total.
The LEAPER shares its critical threat rating with BASTION, BOMBARDIER and ROCKETEER. Compare their weaknesses and drops before choosing what to engage.