Celeste doesn't give you much time to breathe after Source of the Contamination. Switching the Supply kicks off and, yeah, it sounds like a big heroic water-fix moment, but the actual job is simple if you treat it like a quick in-and-out. Before you even queue, take a second to think about what you're risking—this is one of those runs where checking your ARC Raiders Items stash and then choosing the cheapest, free loadout is the smartest play you'll make all night.

Loadout choices that actually make sense

People mess this mission up by gearing like they're heading into a vault raid. Don't. You're not hauling a quest item out, and the switch credit sticks even if you get dropped right after. So go light: a basic gun you can control, a couple heals, and at least one smoke. If you've got spare space, toss in a throwable for panic moments in tight hallways. The goal is to move fast, stay quiet when you can, and avoid turning the tunnels into your last stand.

Getting underground without wandering in circles

You're deploying on Spaceport, so point yourself toward the Launch Towers as soon as boots hit the ground. They're the easiest landmark to read from a distance. The route down is the real "gotcha" for first-timers: look for a collapsed patch of ground just southwest of the main tower cluster. It's basically a busted-open drop that leads straight into the underground network. Once you're down there, don't overthink it. Stick to the main corridor, keep your crosshair at head height, and listen—footsteps and ARC patrol noises bounce like crazy in those tunnels.

Flipping the valve and surviving the bad part

The objective is a red wheel valve bolted onto piping along the wall. You'll spot it because it pops against the dull metal around it. Walk up, interact, and you should see the mission update immediately. That's the win condition. The hard part is everything around it: claustrophobic corners, no long sightlines, and other raiders who know exactly why you're down there. Pop smoke near the entrance if you hear shooting topside, and don't sprint through blind bends—people love holding angles in the dark. If it turns into a mess, back up, reset, and take a different line rather than trying to ego-challenge.

Rewards, follow-up, and planning the next runs

Once you report back, Celeste pays you with Synthesized Fuel for crafting, plus a Spaceport Trench Tower Key that's genuinely useful on later trips when you're chasing restricted rooms. You'll also get the blue Radio Renegade outfit, which is a nice flex if cosmetics are your thing. After that, the story nudges you toward A Warm Place to Rest, so you might want to restock and prep for a longer session; if you're the type who likes to top up gear or grab extra supplies without the grind, plenty of players use marketplaces like RSVSR to pick up game currency or items and get back into raids faster.