Guild Wars 2

And, I have an level 80 Warrior sitting there on Tarnished Coast.
I haven’t been on in awhile though so I’m a little lost.
Maybe I should just work towards world completion? And of course the story quests!
No idea what to do with skills and the rotation though, my gear, weapons, etc.
And is there a guide or something somewhere that lets me know all the zones in Guild Wars 2? Because, I just started this back up last night and went on my Level 80 Warrior and didn’t know where to begin with zone/world completing.

Unfortunately I can’t help you with skills or builds for a warrior except to say that you probably don’t have much catching up to do. They haven’t added any new tiers of equipment since ascended, and any new skills are optional so you can start playing right away. But I’m sure some other people could recommend builds.

I think map completion is a good place to start because it will allow you to familiarise yourself with the game again before you jump into doing anything more complicated.

This page gives you information on all the regions and links to their individual pages: https://wiki.guildwars2.com/wiki/Tyria

But this one might be more useful if you’re just looking for a list of maps: https://wiki.guildwars2.com/wiki/Location

Some of those maps might not be accessible to you. If you don’t own Heart of Thorns then you can’t enter the Heart of Maguuma (Verdant Brink, Auric Basin, Tangled Depths and Dragon’s Stand) and even if you do own it you’ll have to buy Episodes 1 and 2 of the Living Story Season 3 to get to Bloodstone Fen and Ember Bay. Episode 3 and Bitterfrost Frontier will unlock for free since that one is new, but you have to own Heart of Thorns to go there.

But if you don’t have HoT I wouldn’t worry about it just yet – stick with playing the stuff you have got and then you can decide whether you want to buy it later on.

Do world completion, or start a new character and let that guide you through.

Ultimately, though, just do whatever the heck seems interesting. If your character is 80, you can do anything. (and, unlike other MMOs, low level zones will not be super-trivial, though they will be easy, because you scale down to match.)