For anyone curious how to get a certain achievement, I have constructed a guide (since last year March in discussions when there were no real guides) on the TrueSteamAchievements Site. Most are self explanatory. I was surprised by the lack of achievement guides until it occurred to me that achievements were only added recently. But regardless, anyone who has been looking on how to get all achievements, click the link below.

A note beforehand, all achievements DO NOT REQUIRE the DLC to unlock, and are all unlockable on the base game

Also, remember to TURN OFF CHEATS from the startup screen if you have it on. Otherwise you will not be able to get the achievements. Wasted too many days for forgetting to simply remove 1 lousy tick box.

https://truesteamachievements.com/game/Blood-and-Gold-Caribbean/achievements

Leave a post here if anything is unclear. I kind of wrote these guides at 2am at the time of writing.
Feel free to comment if something is unclear or was badly written.