I just recently purchase all 3 The elder scroll bundle.

I have been a long time fan of The Elder Scroll ever since I got the TES 3: Morrowind on PC/Xbox.

I tried to get into the earlier game but it was confusing.

So I was wondering what is the chronological order in terms of release time?

The games I am looking at are in abc order since that is "more confusing"!
-An Elder Scrolls Legend: BattleSpire
-Elder Scrolls: The Arena
-Elder Scrolls 2: The Daggerfall
-Elder Scrolls: The Redguard

Are they considered canon, though?

Yes I believe they are still considered canon since references to both are contained in both Morrowind,Oblivion and Skyrim.

For Example

Battlespire

This games events are mentioned in several books some found in all three games
The Soul Cairn
The Daedric Crescent Weapon
Xivali Moath in ESO
and probably more

Redguard

Ngasta is in this game who wrote the Ngasta Kvasta Kvakis
Details about Stros M'kai that are found with ESO
The Ballad of Cyrus as song by The Pirates of the Marie Elena in the Imperial City Waterfront
A great deal regarding Crowns and Forebears

any maybe more from both games

most of the lore that has been retconned is some minor stuff from Arena and Daggerfall and the Sub Tropical Cyrodiil to Temperate Cyrodill bit.Also the Orcs,most of the retcons were for the best in my opinion.Really help differentiate the series.

They are considered canon, but they are spin-offs and play differently from main series. Battlespire doesn't have open world, but consists of sequence of levels like 3D Action game, and Redguard is more like Adventure game.

I know that the player character exists in the lore, but I believe that only the main quest is cannon.

Of course, Daggerfall's main quest happens to have multiple endings depending on who you give a certain object to. The actual canon result is, surprisingly, that all the endings occurred, even though they are mutually inconsistent. (This is termed "The Warp in the West.")

As far as I understand it, membership of some of the various guilds is canonical, but not leading any. As far as Morrowind goes, I believe the Nerevarine is canonically a high ranking member of House Hlaalu (not counting the Hortator title you get from each Great House), but a quick search didn't reveal the actual reference to that.

That's a bit shame... I like when your deeds are 'recorded in history' and, well... all PC's in TES games did a lot of deeds...

Thanks. :)

Now that... makes things difficult. :D

There's no solid answer, but I think the general consensus is that every questline in every game is canon, but they weren't all done by the same person (there would be huge consequences if one person became the head of every major organization in a country besides the government, after all).

I tried to play all older ES games after i already played Oblivion and Skyrim too. But i failed, didnt manage to play them longer than a few hours, and morrowind a few days. One exception: Redguard. i even finished the game. twice.