ARC Raiders Stella Montis Loot: The Endgame Indoor Haul

Stella Montis unlocks at 24 rounds and is the endgame indoor facility — carved into the northern mountains, cold, sterile, and unusually well preserved compared with the wreckage of the lower Rust Belt. Everything you loot here is inside the sealed facility, which is what makes it high-risk, high-reward: there is no open apron to retreat across.

Keys worth carrying

Stella Montis has three keys:

• Stella Montis Assembly Admin Key — the Assembly.
• Stella Montis Archives Key — the Archives.
• Stella Montis Security Checkpoint Key — the security checkpoint.

These open the sealed rooms where the best containers sit. Three keys is fewer than the other maps, but the facility is compact, so each one covers a lot of ground.

When loot value goes up

Stella Montis runs a tighter event set than the early maps. Community-reported windows (UTC times are community-sourced and pending official confirmation — see research/real-sources.md §A3):

• Night Raid (Major) at 02, 04, 10, 17, and 19 UTC — the dominant value window.
• Electromagnetic Storm (Major) at 07, 16, and 22 UTC — value plus lightning damage.

Note the Matriarch boss event does not come here — the facility is too small to host her — so her rotation covers only Dam, Spaceport, and Blue Gate.

Because Night Raid is so frequent here, it is less a lucky window and more the default state — the risk is simply higher every time you go in.

How to run it

Go in with a named objective and a kit that can handle close indoor fights and other Raiders, since the tactics page notes the facility funnels players together. Hit the three key rooms, and extract during a Night Raid slot when the bag is worth the third-party risk. The container guide explains what each crate drops, and the map ladder shows Stella Montis is the final unlock.