Sublevel Protocol

Sublevel Protocol is a retro terminal RPG set in a massive underground colony spanning 1,000 procedurally generated sectors.

You awaken as a SYSOP-class operator, a dormant system administrator, brought back to life deep beneath the surface to restore stability to a collapsed bunker complex. Your task is simple in theory but brutal in practice: descend, survive, and reactivate the Sublevel Protocol.

Each sector is a self-contained micro-dungeon. Walls shift, exits shift, and enemy units adapt as the colony's ancient infrastructure reconfigures. The deeper you delve, the more unstable the environment becomes—and the more the bunker feels like a living, observing entity.

MAIN FEATURES

• 1000 procedural sectors  

  Each floor offers a new layout, new dangers, and new opportunities. No two descents are alike.

• Mission system every 10 levels  

  Milestone sectors introduce special objectives: eliminating enemy units, surviving long combat cycles, or conducting reconnaissance to stabilize an area.

• Tactical turn-based combat  

  Manage your energy, health, and positioning as you face increasingly aggressive enemies whose scale depends on their depth.

• SYSOP progression system  

  Gain EXP, level up, and upgrade your Operator character with improved stats and operational capabilities.

• Retro 8-bit terminal aesthetics  

  Pixel grid graphics, CRT distortion, synthetic sound cues, and a user interface inspired by Cold War bunker systems.

• Identity-based gameplay  

  Your chosen operator name will become part of your system logs, mission reports, and combat messages, making every game unique.

ATMOSPHERE

Silence reigns in the colony.  

Systems flicker.  

Each entry in the logbook refers to a forgotten disaster.  

The deeper you go, the more you feel that the complex is aware of your presence—and responds to it.

THE

Restore sublevel protocol.  

Survive all 1000 sectors.  

Discover what lies at the bottom of the colony.