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Sneak & battle your way through a procedurally generated mothership in this stealth action RPG! Supports user content & the Oculus Rift!

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4089 takes many of the things you loved from 3079 & 3089, like character customization via stat points, grappling hooks, special powers, building options, futuristic settings, random enemies, weapons, and environments. Then, it presents itself in a much more focused game that gets you into the action easier and faster. 4089 takes more influence from the roguelike genre & has more emphasis on stealthy elements than ever before.

You'll be able to battle & sneak through a procedurally designed ship. Hack cameras & locked doors. Build walls for cover. Break down secret walls to discover new paths. Choose whether you are playing for the full adventure, or just a quick challenge. Edit or create your own rooms, enemies, weapons, textures, models & sounds, then share them with the world!

4089: Ghost Within has 3 game modes, "Normal" mode (skill points are lost at death), "Limited Lives" mode (no skill points are lost, but you only have 4 lives) & "Permadeath" mode (you only have 1 life).

Also, find out how the worlds of 3079 & 3089 connect in this sequel and decide what to do with the all powerful Overlord.

Java 8 comes bundled with 4089. However, you may need to install Java 8 on Linux or Mac to run. If you are having trouble installing or running 4089, please uninstall old versions of Java & re-install the latest from .

Want to create your own content?

Read the primer here:

Game Series

4089 uses OpenVR, tested compatible with DK2 & v0.6.0.1. May be compatible with older runtimes, other operating systems & headsets.