The second Call of Duty: Black Ops 7 Zombies map is here to kickstart Season 1, a Liberty Falls observatory floating on a giant skull in orbit of Saturn. As always, there's a brand-new Wonder Weapon to find and a fun little Easter Egg to solve. Thankfully, instead of battling against tedious algebra, you only have to survive a few gauntlets against the George Romero-esque guardian patrolling the intergalactic aerie, O.S.C.A.R.

If you pull it off, he drops the LGM-1, which, as its name suggests, houses a 'Little Green Menace' who sends UFOs careening towards enemies whenever you pull the trigger. It's a delightfully retrofuturistic weapon that feels right at home alongside the likes of the Ray Gun and Face Melter, and can be yours if you follow this guide.

To get started, you need to find a few parts scattered across the map.

You should do this as soon as possible, as later steps require waiting on O.S.C.A.R. to respawn, which could hurl you into unnecessarily high rounds.

Absolute Zero Fragments

Shoot three Aether Crystals with Cryo Freeze ammunition to get all of the Absolute Zero Fragments.

Aberrant Wiring

Find and shoot the flickering lampost to get the Aberrant Wiring. The lampost is random every time.

Car Battery

Return to the Crash Site when you have a Pack-a-Punched weapon and shoot the gearstick inside Ol' Tessie; the Car Battery will drop from the now-exposed hood.

Crashed UFO Part

Destroy one of the drones circling O.S.C.A.R., and it will drop the Crashed UFO Part.

It seems that you can do the following steps in any order, but we've outlined the most optimal route.

Lure O.S.C.A.R. to the Luminarium by Jugger-Nog and enter the planetarium to the northwest. Interact with the Stellar Dissector to place the Car Battery.

Stay in the room until the trap expires, and O.S.C.A.R. will dissipate, leaving behind a Shiny Trinket. The Shiny Trinket uses your Tactical slot, but is useful for the next step.

Wait until O.S.C.A.R. respawns (this appears to take roughly 2-3 rounds) and bring him to the Museum Infinitum by Speed Cola.

Interact with the rocket's panel, and you'll trigger a launch sequence. Make sure that O.S.C.A.R. is behind the rocket (you can throw a Shiny Trinket to lure him), and he will once again vanish.

Shoot The Steaming Valves

While waiting for O.S.C.A.R. to respawn, head to the Observatory Dome and look for a steaming valve. It will make a distinct sound when you get close enough.

There are two below Pack-a-Punch; two above the piano on the upper balcony; one above the console to the west, one on the southwestern pillar; one on the southeast wall, one in the northeast corner; and one in the portal room.

Shoot the steaming valve to initiate a timed sequence - this valve is always random. Find the next, shoot it, and repeat; eventually, the telescope in the centre of the dome will move. If you fail, you have to wait another round for the valves to reset.

Destroy O.S.C.A.R. In The Observatory Dome

When O.S.C.A.R. respawns, bring him to the Observatory Dome and interact with the piano opposite Pack-a-Punch.

You will now be looking through the telescope. Simply centre your crosshair on the sun, and a yellow laser will fire into the centre of the room.

You will be safe from zombies and O.S.C.A.R. during this segment.

Lure O.S.C.A.R. into the laser, and he will malfunction, dropping the LGM-1.

Voila! You have a new Wonder Weapon to play with.

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