Though this might be more of a Continuity Snarl than anything, especially given that has a lot of differences design-wise.

Back from the Dead: Curiously enough, despite his death in the film, Turnbuckle returns alive as a crew member of the pirate ship you fight against in the first mission.

Not to mention that simply buying a ship equipped with the Nova Mortar is a much more cost efficient option. Star Mortars also reload very slowly, when all of the broadside heavy guns are Star Mortars, it can leave the ship with drastically lower firepower while they are being reloaded, and the massive blast radius makes it likely that firing it at close range will damage their own ship. A single Star Mortar is already an expensive weapon costing 40 Victory Points, but an entire broadside of them can cost up to 160 Victory Points, more than the cost of an Imperial Frigate (131 Victory Points). However they still come with the same disadvantages of a single Star Mortar ( astonishingly low velocity projectiles and a very long reload time) as well as being the most expensive weapon refit in the game. One Star Mortar already does a lot of damage and has a massive blast radius, and an entire broadside of them is one of the most devastating weapon batteries in the game.

Awesome, but Impractical: Star Mortar broadsides.

One of the logs mentions a mapping device similar to the one in the movie, but the other mentions of Treasure Planet aren't really relevant except as backstory.

Artifact Title: Treasure Planet is only mentioned in Jim's logs between missions.

Asteroids will break apart into smaller asteroids if they take enough damage.

Asteroid Thicket: Unrealistically dense asteroid belts appear on some maps as hazards, some of these asteroids are slow moving, but others can move quickly.

Arrow Cam: Pressing 'B' will cause the camera to focus on and follow the nearest projectile, until it hits something.

However, the fleet size limit may be exceeded if enemy ships are successfully boarded. If the maximum number of ships is reached in the fleet customisation screen, the player cannot purchase any more, even if they still have enough Victory Points to buy more ships. The maximum fleet size for each player in open skirmishes can be set between 1 and 10. This is most noticeable when the player is given a Fast Frigate, which comes with a Heavy Plasma Cannon by default, but if the player switches the Heavy Plasma Cannon for a different weapon on hard mode, they cannot get it back.

Arbitrary Equipment Restriction: The player is not able to buy Heavy Plasma Cannons in the campaign when the difficulty is set to hard, despite the Royal Navy normally having access to Heavy Plasma Cannons.

Ambadassador: The Procyon Ambassador, Evar, was an Admiral in the Procyon Navy during the Terran-Procyon War before becoming the Procyon Ambassador.

Alpha Strike: The player has the option to command all ships in their fleet to fire at the same target.

All Your Base Are Belong to Us: The final mission takes place during an attack on the Royal Parliament by the Procyons, who had managed to reach the Parliament with no resistance due to most of the Royal Navy being sent to the frontier to defend against the Ironclads.

Aliens of London: The Procyons speak with a Russo-German accent.

'Open' maps allow much greater freedom in customising the scenario, as the player is allowed to choose what ships are in their fleet, as well as how many 'players' participate in the scenario.

These maps do not allow the player to customise the fleet, but they do allow the player to play as any side. 'Historical' maps take place either during the Terran-Procyon War, or recount various Pirate raids or Ironclad sightings. In addition to the campaign, the game also has a 'skirmish' mode, which allows the player to play as either the Royal Navy, Pirates, Procyons or Ironclads in either 'historical' or 'open maps.

Treasure planet battle at procyon 1920