Assassin's Creed 4: Black Flag Android Cheats and Tips

Before you get in front of the gate climb the building and kill the gunner and jump to get inside the gate

You have to build the nether reactor core, you will need 6 iron and 3 diamonds, then google how to build the nether reactor,you will be attacked by monsters in there

You can pet the same dog over and over until you get the challenge. Find one dog on any of the islands and you are good. I think there is one in Havana and I know there is one in the Pirate Home Base.

The diving bell comes only through game progression. You need to advance the story to when Blackbeard is concerned about getting medicine. Once you start that mission you will use the diving bell for it, after that you get it to use whenever you want.

As soon as you accept the contract it should show you the target on the map. Travel there then use eagle vision to see who your target is.