Planned Release Date: November 2026

About This Game

November 1941. The Strait of Gibraltar is the gateway to the Mediterranean, watched day and night. You command a Type VIIC U-boat.

UBOOTSIM is a WWII submarine simulator meant to be played patiently: observe, calculate and pick the exact moment to fire.

What you do

• Periscope with compass, elevation and target tracking.
  
• Hydrophone to locate ships without surfacing.
  
• Torpedo Data Computer (TDC): manual for purists, or automatic (easy mode) if you'd rather focus on tactics.
  
• Torpedo tracking window to watch every shot run to the target.
  
• Deck gun for surface targets.
  
• Real nautical chart of the Strait, plot your course with a click.
  
• Escorted convoys, hunting destroyers and patrol aircraft.
  
• Day, night and storm scenarios.

Game modes

• Patrol: hunt convoys around the Strait.
  
• Mission: run the Strait between the Atlantic and the Mediterranean, with fewer aids, currents and Gibraltar's defences.
  
• Historical mission: Force H and the carrier Ark Royal.
  
• Wolfpack attack alongside other U-boats.

War diary with your tally of successes. Interface in English, Spanish and German.

UBOOTSIM is free, with no ads and no in-game purchases. It is made by a single developer as a hobby.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

This game was developed with the help of AI tools for code and some of the graphics.