Mojavecraft

Play Minecraft inside Fallout: New Vegas. Load a save outdoors and you're Steve in the Mojave: Minecraft's physics carry you over New Vegas's ground, rocks and roofs, and Minecraft's hotbar, hearts and hand replace New Vegas's HUD. Mine, place blocks, open your inventory (E), chat with T and run commands with /.

New Vegas keeps what it needs: Esc for its pause menu, Tab for the Pip-Boy, R to open doors, talk and loot, and B to switch back to New Vegas controls.

Press J to salvage your junk into Minecraft materials: scrap metal into stone bricks and iron, tin cans into sandstone, and 14 kinds of junk in all. Builds unlock Courier perks: a farm sends fresh food every day, a house (bed, door and roof) gives +25 carry weight, and a lit beacon brings 100 caps a day. Finishing Goodsprings-area quests drops Fallout-themed chests next to you.

Multiplayer, up to 8: press Play to host and friends join from Melty. Everyone shares one Minecraft Mojave over the same map: see each other's Steve and builds, build and fight together. Each player keeps their own New Vegas game (quests, caps, perks), and New Vegas NPCs near you show up for friends as named stand-ins they can fight.

Press /mojave eggs for NCR Ranger, Legionary, Powder Ganger, Fiend and NCR Trooper spawn eggs, and fight New Vegas's people with Steve's weapons and Minecraft's mobs.

You need Fallout: New Vegas and a Microsoft account that owns Minecraft: Java Edition. The first Play asks you to sign in once, then downloads Minecraft by itself.

Credits: built on universal-modder's Minecraft passthrough example (MIT) and SkyCraft's and CyberCraft's approaches (MIT). Bundles Prism Launcher (GPL-3.0) and Fabric API (Apache-2.0) and e4mc (MIT), unmodified.