The ability to join Jolly Roger's Crew indefinably
Climbing sail rigging
Carrying bodies
ability to destroy an island with grenades
Grounding a ship
Cut a ship in half from ramming
Tripping people (Including Jolly Roger, and N.P.C.'s lol)
Going into ship's captain's quarters
metal ships
Mountain climbing (No glitch)
Lifeboats from sinking ship (can be attacked)
Choosing spawn point for own ships
Cutting masts in half
raiding other pirates' ships (Including privateer ships)
Maelstroms
Jolly Rogers (Flags)
Tattered Sails Black Pearl
Fancy boarding tricks (Jack's Famous Endeavor to Pearl "Tightroping.")
Shooting a ship apart, including rudder, and helm
Using utensils as ammo (Interceptor vs Pearl scene)
Blackjack in Faithful Bride
Owning homes
More empty home on main islands
Direct path from Los Padres to Los Pulgas
Slitting enemy throats in dead of night
sent to Kingshead Jail when on Kingshead and killed
Old calm sailing music
Making Wild Islands and Kingshead teleportable to
Florida (Fountain of Youth)
Navy Bastion
Chase cannons (Bow cannons, Stern Cannons for more protection)
wow, I made a long list
Too much?