The current sandbox is just mission mode without a mission. While this is just a more cheaty version of it. 2. You can spawn items with console commands 3. There was a way to force spawns in the main sub but that might've been a plugin 4. You can disable sub damage with a command 5. You can disable ...

Don't necropost, locked.

There are no hydrogen tanks, if you mean welding tanks, they aren't the same.

Both timers for the shuttle can be changed by the host.

That price was in the Q&A before the publisher was involved. It has been removed from the FAQ and Regalis has said that it is no longer accurate.

There is a redirect already on the forum, labeled "Legacy Download".
Right under the Custom Submarines subforum.

Those are integrated graphics, they aren't very good and from what i know can't be replaced in any way.
It may run but i don't know, the best idea would be to buy a new laptop or desktop pc.

From the legacy version, yes i think.
The requirements on the steam page should be accurate. https://store.steampowered.com/app/602960/