GRP (Gravity Restraint Projector)

Game: The Callisto Protocol

A miniaturized graviton field generator used by UJC Correctional Officers to pacify inmates and manipulate objects.
Weapon Type: Auxiliary Ranged
Ammo: GRP Battery Pack

The GRP device is found halfway through Chapter 3: Aftermath. It will be given to you for free shortly after reaching the medical area, and it cannot be missed.

Name
Upgrade Description
⠀Credits
GRP Recharge Speed Upgrade
Small: Increases the GRP recharge rate via additional heat sinks.
? callisto protocol credits icon
GRP Recharge Speed Upgrade
Medium: Improves the recharge rate of the GRP using experimental wiring materials.
900 callisto protocol credits icon
GRP Recharge Speed Upgrade
Max: Maximizes the GRP recharge rate through AI-assisted power cycling.
2700 callisto protocol credits icon
Energy Upgrade
Small: Increases the maximum energy capacity with aftermarket expansion cells.
? callisto protocol credits icon
Energy Upgrade
Medium: Increases the maximum energy capacity with an upgraded primary cell.
? callisto protocol credits icon
Energy Upgrade
Max: Maximizes the GRP energy capacity next-get battery tech.
2700 callisto protocol credits icon
GRP Velocity Upgrade
Small: Increases launch strength by removing safeties. Target can be injured upon impact.
? callisto protocol credits icon
GRP Velocity Upgrade
Medium: Further increases launch strength. Target can be previously injured, including limb loss.
? callisto protocol credits icon
GRP Velocity Upgrade
Max: All safeties on launch velocity removed. Target can impact at near-fatal speeds.
2700 callisto protocol credits icon
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