New Pugilist Player and Other Questions

[Enkidoh]

Welcome to Eorzea!

For an (incomplete) list of abbreviations both official and player-created used in the game, this list is definetely helpful. (And already provided by Endeleon above, so I concur ).

And adding further info on Iscah's point of the difference between '1.0' and '2.0' versions of the game, you'll often see or hear the term 'Legacy' used in reference to FFXIV 1.0, and this can be very confusing because the same term is used to describe completely different things, so just be aware of that. To summarise the most common uses and differences though:

'Legacy Campaign' - a special qualification players of the original version of FFXIV could attain by paying for 90 days of subscription in the original game - this granted special bonuses in ARR (specifically the unique Legacy Chocobo mount, a permenant reduced subscription price for ARR, day 1 elegibility for phase 1 of ARR's Beta Test, and an option to have the player's name or an alias listed in ARR's end credits - this last point can be seen right at the end under 'Meteor Survivors', my own name is included incidentally ). Legacy Campaign status has not been attainable since September 2012.
'Legacy Story' - 1.0 players who satisified certain gameplay requirements in 1.0's story gained a slightly different storyline in ARR with extra or different cutscenes that basically had their character reappear in post-Calamity Eorzea and which reference their actions in the old game. It's not a completely different story though (other than having a different starting opening), but just one that references the player's accomplishments in 1.0.
'Legacy Mount' - term usually given to the aforementioned Legacy Chocobo, a special mount given to players who were elegibile for the Legacy Campaign. It is also used to refer to the seperate Goobbue mount that was available during a special event in 1.0 but only for a limited time, and is also now unattainable too.
'Legacy Character' - just used to describe a character originally created in 1.0 and transferred into the new game. Legacy characters start ARR with all their previously attained levels, EXP, classes, Jobs, gear and items intact. They also have a special mark that identifies them as such (see below).
'Legacy Mark' - also officially called by SE 'The Mark of the Twelve'. This is a special tattoo that appears on the back of a player character that was originally created in 1.0 and transferred into ARR. The mark can be hidden and made visible at will by typing the '/lmark' or '/legacymark' command. It's often hidden by armour though so even if a character does have it visible it often isn't seen.
'Legacy Server' - like Legacy Characters, SE reused some of the server names from 1.0 and these servers were designated 'Legacy Servers' because unlike 'new' servers which were restricted to only having new characters created on them, 1.0 characters could only transfer to Legacy servers (while also welcoming new characters created on them as well). This restriction was long since removed though, but the 'Legacy' branding still remains. Legacy servers can also be identified by their names all being names of famous or reoccuring weapons throughout the FF series ('new' servers have the names of summons, monsters and characters).
'Legacy Camera' - a setting in the Config that changes the default camera control setting in ARR to one resembling the old 1.0 camera (although personally I think it works a lot better than the actual 1.0 camera, but that's me.).
'Legacy Achievement' - old achievements that were only available to be gained back in 1.0 and are now unattainable. They are listed in ARR's Achievement list under the 'Legacy' tab, but this tab is not available on a new character and so would not even be known as having existed by most players.

As for why the 1.0 version is no longer playable, that's because it was the original version of the game and was released incomplete and full of bugs and issues, many of which simply could not be fixed. SE replaced the development team responsible for that version completely with a new team and who decided that the then current game simply was beyond salvation, and instead begun development on a complete reboot for it, or 'version 2.0'. This rebooted version is A Realm Reborn (ARR), the game you're now playing.

But rather than throw the existing 1.0 players under the bus, SE transfered all existing 1.0 character data into the new game, with ARR not only serving as a reboot to 1.0, but a sort-of sequel as well, with the 7th Calamity (depicted in the 'End of an Era'/'New Beginning' trailer) serving as the lore reason for the changed zones and improvements in the new game. FFXIV 1.0 is now completely inaccessable and gone forever, but you do not need to know anything that happened back then as there was not that much story covered in 1.0, such was the terrible state that original version was in, and much of what happened back then is now retconned anyway. So don't feel you've missed out on not knowing what happened in 1.0 as ARR provides the relevant information to ARR's story anyway where necessary.

I'm really sorry for the text dump, but hopefully that clarified the differences between '1.0'/Legacy' and '2.0/ARR'.