The Spaceport Trench Tower Key is one of the best value keys in ARC Raiders — and most players sleep on it because it's only Uncommon. Don't. This cheap, common-to-find key unlocks the two Trench Towers on the Spaceport, and a full clear of both is one of the biggest single-raid hauls available without touching an Epic key. This guide gives you exactly where the towers are, how many you can open per key, the real loot profile floor-by-floor, and how the key ties into Celeste's quest chain — cross-checked against the ARC Raiders Wiki and the guides that ran the rooms.
Quick answer (TLDR): The Spaceport Trench Tower Key is an Uncommon, single-use access key (weight 0.25, sells for 100 Coins) that opens the locked doors at the North Trench Tower and South Trench Tower, in the northern section of the Spaceport between the West and East Hangars (arcraiders.wiki). One key opens one tower — it's consumed on entry, but once you're inside that tower you can open its remaining doors for free; bring two keys to clear both (shacknews). Loot is excellent for the key's rarity: weapon boxes, red valuables lockers, a Security Breach locker, server towers and breachable electronics, with Epic-rarity resources common on the lower floors and Epic / Tier-4 weapon chances up top (gamerant). Each tower runs ~30,000–40,000 Coins, and clearing both can push past 100,000 Coins. Verdict: a must-use — the best Coin-per-key-rarity clear on the Spaceport.
What is the Spaceport Trench Tower Key in ARC Raiders?
The Trench Tower Key is one of the Spaceport's map-specific access keys — consumable items that open sealed doors. The wiki entry states it "unlocks a door to the Trench Towers in Spaceport" and opens the locked doors at the North and South Trench Tower structures (arcraiders.wiki).
Here are the verified item-card stats — read these off the in-game card, not a third-party tracker:
| Property | Value |
|---|---|
| Rarity | Uncommon |
| Type | Single-use access key (consumed on entry) |
| Weight | 0.25 |
| Vendor value | 100 Coins |
| Stack size | 1 |
| Map | The Spaceport |
| Unlocks | One Trench Tower (North or South) per key |
The headline here is the rarity-to-reward ratio. This is only an Uncommon key — far more common to find than the Epic keys on Dam or Blue Gate — yet it opens a loot room on par with rooms gated behind much rarer keys. At 0.25 weight it's free to carry, so grab every one you see and bank them for a Spaceport run.
If you're working the whole Spaceport keyring, this slots in alongside the Spaceport Container Storage Key and the Spaceport Control Tower Key — same map, same "find the key, find the room" loop.
How do you get the Spaceport Trench Tower Key?
There are two ways to get it (arcraiders.wiki, gamerant):
- Scavenging (most common): it's a random interior-loot drop that can appear across Dam Battlegrounds, Buried City and the Spaceport — concentrate on residential blocks, apartments and admin buildings, where keys spawn most often. Desk drawers and lockers are your best bet.
- Quest reward — "Switching the Supply": Celeste's quest tasks you with turning valves in an underground Spaceport tunnel, and rewards the Trench Tower Key (gamerant).
It's also a key you'll use in another Celeste quest, "Turnabout" — that quest sends you to the North Trench Tower to upload data at a terminal on the second floor, and pays out Heavy and Medium Gun Parts on completion (thegamer). As thegamer's guide warns: "Make sure to put the Trench Tower Key in your safe pocket! If you lose it, you'll need to pick up another one."
Where are the Trench Towers on the Spaceport?
The two towers sit in the northernmost reaches of the Spaceport map, in the northern section between the West and East Hangars, right next to each other near The Trench (shacknews, gamerant). They're labeled directly on your in-game map as the North Trench Tower and the South Trench Tower — open the map screen and you'll see both markers.
The catch is the trek. As gamerant puts it, "the trek isn't going to be easy, as you'll encounter several ARC machines and hostile players along the way" — the open hangar yards between extraction and the towers are exposed, and the towers themselves draw traffic precisely because of the loot inside.
How many doors does one key open?
This trips a lot of players up. One key opens one tower. The key is single-use and consumed on entry, but here's the trick: "Once you unlock one door in a tower, you can open the rest of them from inside" (shacknews). So a single key unlocks the whole of one tower's doors — you don't need a key per door.
What you do need is a second key to clear the second tower. If you and a squadmate each bring one, you can split North and South and walk away with both. Quick tip from documented runs: check both sides of each tower before burning your key — sometimes a door has already been opened by an earlier Raider, saving you the charge.
Spaceport Trench Tower loot breakdown
As always, the loot is randomized — no fixed item list. But the container sets are documented, and they're stacked. The general profile: the lower floors are dense with containers and drawers that have a high chance of Epic-rarity resources, and the upper floor holds a weapon crate with a high chance of Epic-quality or Tier-4 weapons (gamerant).
Here's the tower-by-tower container breakdown from a documented clear (shacknews):
| Tower | Documented containers | Est. value |
|---|---|---|
| North Trench Tower | Weapon box · red valuables lockers · several drawers · breachable electronics boxes · med case · Security Breach locker · loose Electronic & Mechanical spawns | ~30,000–40,000 Coins |
| South Trench Tower | Weapon box · grenade case · computer server towers · red valuables lockers · breachable computer & mechanical boxes · several drawers | ~30,000–40,000 Coins (the more lucrative of the two) |
The standouts: the Security Breach locker in the North tower is your blueprint chance, and the server towers in the South tower are high-value Electronics. A full clear of both towers can push past 100,000 Coins in items — exceptional for a pair of Uncommon keys. As with every locked room, value climbs further during Night Raid and Electromagnetic Storm conditions, which apply a loot-value modifier.
One enemy note straight from the source: "You'll need to be mindful of the Rocketeer that likes to patrol the airspace near the towers" (shacknews) — and expect ARC machines waiting inside once you breach. A smart play is to seal the doors behind you after entry to slow down any third party.
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Is the Spaceport Trench Tower Key worth it?
Absolutely — it's one of the best value keys in the game. You're spending an Uncommon key (one of the easiest to find) on a room that returns 30,000–40,000 Coins, with a Security Breach locker for blueprints, a weapon crate for Epic/Tier-4 rolls, and Epic-rarity resources on the lower floors. Clear both towers and you're looking at a six-figure Coin raid off two keys that cost you nothing to carry. Pound-for-pound, nothing on the Spaceport beats it.
The only real cost is the walk. The towers sit in the exposed north end of the map past the hangar yards, so you'll fight ARC and likely other Raiders to get there and back. Bring shields, watch for the patrolling Rocketeer, and ideally run it during a Night Raid for the loot bonus. If you can survive the trek, this is a default stop on every Spaceport run.
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FAQ
Where do you use the Spaceport Trench Tower Key in ARC Raiders? At the North Trench Tower and South Trench Tower, in the northern section of the Spaceport between the West and East Hangars. Open your map and you'll see both towers labeled. Use the key on a locked door at either tower (arcraiders.wiki).
How do you get the Spaceport Trench Tower Key? Two ways: as a random scavenging drop from interior loot across Dam Battlegrounds, Buried City and the Spaceport (focus on residential and admin buildings), or as a reward from Celeste's "Switching the Supply" quest, where you turn valves in an underground Spaceport tunnel.
Does one key open both Trench Towers? No. One key opens one tower. It's consumed on entry, but once you're inside a tower you can open the rest of that tower's doors from the inside. To clear both the North and South towers you need two keys.
What loot is in the Spaceport Trench Towers? Randomized but dense: weapon boxes, red valuables lockers, drawers, breachable electronics and computer boxes, a med case, a Security Breach locker (blueprint chance) and server towers. Lower floors favor Epic-rarity resources; the upper floor holds a weapon crate with Epic/Tier-4 chances. Each tower is worth ~30,000–40,000 Coins; both together can exceed 100,000.
Is the Spaceport Trench Tower Key single-use? Yes — it's consumed when you unlock a tower. The upside is that one key opens all of that tower's doors once you're inside, so it's effectively "one key per tower," not one key per door.
Why is the Trench Tower Key considered great value? Because it's only an Uncommon key — cheap and common to find — yet it opens a loot room that rivals rooms gated behind Epic keys. The Coin-per-key-rarity return is the best on the Spaceport.
