Sapphire Sky coming soon
See Sapphire Sky
A game, and a programming language. Different products, same habit: nothing ships on a claim that has not been measured.
A WW2 submarine sim in space. Hunt, and be hunted.
One developer and his kids. The submarine core — cloak, silent running, sonar, power allocation, the convoy hunt, the crew, the gate network — is playable today; depth and polish are still growing.