The "Switching the Supply" quest in Arc Raiders is an early objective from Celeste that's simple but sets the tone for navigating the Spaceport map. Players drop into the underground tunnels to sabotage enemy infrastructure by turning a specific valve. It usually unlocks after completing her initial quest chain, around quests 30–35, and rewards a blue Renegade color variant plus a Spaceport Trench Tower Key, which opens access to high-loot areas. The mission works well for solo players or small squads and focuses more on careful movement than combat, though ARC patrols and rival raiders can make the tunnels tense ARC Raiders Boosting.

For the fastest route, select the Spaceport map at matchmaking and aim for a southern spawn near the Launch Towers. The main tunnel entrance is just south of the towers, often marked by grating or a half-open hatch flanked by crates. While there are multiple entrances, the southern one is the straightest, with fewer patrols. Dropping in during low-traffic hours or with Night Raid modifiers helps avoid PvP interference.

Once inside, follow the stairs down and veer left into the main corridor, ignoring side passages that lead to dead ends or ambushes. The tunnels stretch roughly 150–200 meters, with concrete passages lit by flickering lights. Stick to the left wall and watch for ARC drones. Silenced weapons or melee attacks keep noise low, as loud sounds draw reinforcements quickly.

About 100 meters in, you'll reach a wider chamber dominated by four green filtration tanks surrounded by yellow piping and maintenance panels. The objective valve—a red steering-wheel-style wheel—is positioned at waist height near the tanks' base. Interact by holding the prompt for a few seconds; the quest completes instantly, even if you die afterward.

Common mistakes include confusing similar valves in side rooms or climbing the wrong ladders. Stay on the ground level and follow the main artery west from the tanks if you get lost. Nearby grey containers often hold ammo or meds, but the valve should be the priority to ensure quest completion. In squads, assign one player to scout while others cover the rear. Solo players can move through shadows and crouch to avoid attention.

Extraction is flexible. Helipads above the Launch Towers or Raider Hatches provide quick exits, but the quest completes as soon as the valve is turned. You can then farm nearby industrial zones for bonus loot. Using Safe Pockets helps guarantee that collected items aren't lost, even if you encounter other players. After finishing, return to Celeste to complete the handoff and continue toward advanced contracts.

"Switching the Supply" teaches early tunnel navigation and risk-reward planning, skills essential for higher-value runs. Practicing in public lobbies, consulting interactive maps for spawn points, and chaining it with nearby objectives like husk hunts can make the run smoother buy ARC Raiders Coins. With low gear requirements and high repeatability, it's a solid early quest that eases new players into more challenging Arc Raiders content.