Early Access · Campaign update 0.11.2
The new delivery campaign is now the playable Steam build. Its interface and story subtitles are currently in Korean. We are continuing to improve environments, parcel handling and cinematic presentation. Some store media shows earlier builds.

One parcel. An address far above.

It starts with an ordinary delivery. You arrive at a courtyard, leave the parcel and take a photo. When you turn around, the street is gone. Beyond the gate lies a world suspended above the clouds. Somewhere at the top, number 17 is waiting. Pick up your parcel and find a way to finish the delivery.

Climb your own way

Cross stone stairways, timber walkways, rooftops and industrial crossings. Time a moving platform, jump across a gap, pass through a building or take a wider route around a difficult stretch. Keep your parcel with you as the world below grows smaller.
A full fall ends the attempt and sends you back to the foot of the climb. Landing on a lower part of the route can leave you a chance to recover. What you have learned matters on the next attempt.

Take a door into somewhere unexpected

Three optional side worlds interrupt the climb: a vast management office, an inverted archive and a greenhouse where rain rises. Step away from the exposed route, explore their mechanisms and records, and enjoy the view. Finish exploring or leave early, then return to the entrance you used in the vertical world. These worlds add discoveries and route opportunities; they are not permanent altitude checkpoints.

A delivery with something left unsaid

An address repeats. Letters and delivery records point toward someone who expected your arrival. Read, notice the surroundings and piece together what the parcel means. The ascent and the unfinished delivery lead to the same destination.

• Single-player, third-person climbing with jumps, moving crossings and route choices.
  
• One continuous vertical world and three optional side worlds.
  
• Fall risk and repeated attempts; discoveries remain while attempt-specific route progress resets.
  
• Quiet viewpoints and an in-game phone camera.
  
• Delivery records, physical letters and a story revealed along the route.
  
• Display, graphics, audio and control settings; Korean interface and subtitles.