Freeport Island is a new world space set in the Legacy of Kain universe. It features a recreation of the map 'Freeport' from the PVP Legacy of Kain game Nosgoth along with various ruined forts, temples and crypts to explore which are all inspired by either Blood Omen, Soul Reaver or Nosgoth.
It has 13 quests, new followers, new armor, enemies from Nosgoth and Blood Omen, weapons from Soul Reaver 2, Blood Omen 2 and Soul Reaver and a few new spells.
There's also a recreation of Kain's mausoleum from Blood Omen which was originally part of a bigger mod I was working on but gave up with.

There is a boat at Lake Ilinalta that will take you to the island and back.

If you want to use similar weapons to Nosgoth you can use Ghosu's Project Flintlock mod which has a blunderbuss and a grenade launcher :

https://www.nexusmods.com/skyrim/mods/26653

Things you should know before playing :

1) You should go to the Armoury next to the crane on your right when you first get to the island. There are 4 notes that start quests in there. All the other quests are triggered by examining dead bodies round the island. They have notes on them explaining the quest and usually keys that allow you to enter the interior cell you need to be in or get through to complete the quest.

2) There's no navmesh in the sea - Legacy of Kain vampires are killed by water so I didn't want them running into the sea after the player.

3) There's nothing in the sea other than the four shipwrecks so don't bother swimming out to the edge of the world. There's nothing to find there.

4) If your character has a beard it will poke through the Deceiver, Alchemist, Beastmaster and Prophet Elite Masks. A nose or chin that is too long or a brow that is too far forward (by default the Dark Elf presets all seemed to be too far forward) will poke through them aswell.
None of the above masks or the Bloody Raiment Helm work on Argonians or Khajiit, unfortunately. Their heads are just too different.

5) The mod has flavour text on some objects. In the exterior world it's pretty much limited to symbols and banners but there are a few other things like severed vampire heads, the sea serpents bones in one of the shipwrecks and the cage in the pool north of Freeport (none of the impaled corpses in the exterior world have flavour text).
In interior cells there are more things with flavour text such as - a lot of the dead bodies, bedrolls, the blue fire in some of the crypts and ruined forts, some tables in the vampire's clan territory, clan or faction symbols and murals.

6) Zephonim Guards have keys that you need to progress through the mod so don't Fus Ro Da them off buildings.

KNOWN ISSUES :

1) The navmesh to the right of the entrance to the Zephonim clan territory doesn't work properly for some reason and NPCs will often run all the way round the fortress walls rather than across the front of the entrance. I don't know why, I've rebuilt it more than once and nothing has ever fixed it 100%.

CREDITS

Thank you so much to :

Tamira and Yughues for the palm trees
Yughues aka Nobiax (http://www.sharecg.com/pf/full_uploads.php?pf_user_name=yughues) for creating the original models
Birdy (http://www.sharecg.com/pf/full_uploads.php?pf_user_name=birdy) for creating the decidious tree mesh

https://www.nexusmods.com/skyrim/mods/22018

Marius Radoi for the Soul Reaver Penta-Spike

https://www.artstation.com/mariusradoi

Kelretu for the Iron Maiden

https://www.nexusmods.com/skyrim/users/3624945?tab=about+me

Her515 for the Lich

https://www.nexusmods.com/skyrim/users/17295269?tab=user+files

standalone09 for the iron dagger and sword

https://www.nexusmods.com/skyrim/users/5735065?tab=user+files&BH=1

Convalise for the Light and Fire glyphs from Soul Reaver

https://www.deviantart.com/convalise

Also thanks to everyone that helped me out on Discord. I've worked on the mod over the space of years now and I forgot everyone's names but thanks for all your help!