[Origin] 30% storewide discount -> (ME3&ME2 DLC Bundles 58% off)

I'm kind of in the same boat. I've owned the base game since pretty much the release but I've only played the multiplayer so far. Well, except for a couple of minutes from the beginning of the SP campaign. I stopped playing ME2 somewhere at the end of the of the game since I wanted to get and play the DLC as well but they were ridiculously overpriced at the time.

I can only agree. I'm still undecided

I would definitely say so. They are great and holds some of the best content in the entire series.

They add some characters and plot. I actually think that the citadel dlc for mass effect 3 is worth that on it's own. Mass effect is an amazing series and still one of my most beloved series of all time. The price is a pretty high, but I bought the dlc individually at a higher rate, so I think it's worth it. It does add to the story in a significant way and ME2 dlc carries over and affects ME3 (more choices/characters, etc.).

I'm for obvious reasons, not the ideal person to answer this and I'm sure you'll get more substantial information in time but as I understand the most "important" DLC are the ones for Mass Effect 3 where they made an effort to fix parts of the in many people opinion "botched" ending of the game.

Other than that I'm just expecting more of the gameplay and atmosphere from the base game. I'd absolutely start playing the first game which many consider the best, although I like ME2 the best, and as I understand thing have all the extra material available for free by now.

ME2:

1. Kasumi - new companion with 1 loyalty mission and can appear in ME3 ( not really important).
2. Overlord - side story, doesnt have any impact on the overall plot. Can meet 1-2 of the NPCs in ME3 depending on decisions.(Can go without it)
3. Lair of the Shadow Broker - brings some light on what Liara(one of your companions from ME1) was doing in ME2 instead of joining you. Can continue your romance with her. Somewhat important for ME3 else you will be dropped some surprise stuff out of the blue.(important if you care about Liara)
   4. Arrival - The missing link between the end of ME2 and the start of ME3. (Should be important but the DLCs itself is meh, its enough to read on it)

ME3:

1. From Ashes - bonus companion that reveals some backstory that has no impact on the main story(good only if you care about some lore)
2. Leviathan - gives you the backstory of the main baddies. (really important if you care about lore)
3. Omega - not played but from what I know its good only if you want to revisit Omega from ME2 and like the combat(so not really important)
4. Citadel - fan service DLC to spend some quality time with past and current companions(not important).

So overall you can finish the ME series without any of the DLCs at the cost of losing some details regarding some of the events in the game (Arrival, Lair of TSB) or lore(Leviathan, From Ashes). DLCs itself have no impact on the overall story or the decisions that it lets you make.

Oh dear gods, yes. Almost third of the important story is in the DLCs, because of course it is. Not to mention that probably the best ME2 crew member is a DLC one (unless you play on Insanity, then she is useless).

With it, you get the digital deluxe edition, with comes with all the dlc (and the game, ofc).

If I'm not mistaken, this part is incorrect -- for ME2/ME3, at least (haven't checked the others).
Disparagingly, "Digital Deluxe Edition" of both of those games is still not the complete game with all DLC, and you're generally better off getting the Standard Edition and adding on the DLC Bundles if you want the full game with all DLC.

The Digital Deluxe Editions do not contain all the DLCs, only some. And AFAIK, the DLCs packs are only available through Access Premier, not the basic tier.

You need to add save30 at checkout.

It's been 6 years since ME3 released. I'd say you're safe with buying the DLC now. Especially since there's already a trilogy packs (sans DLC) on Origins.

You can't buy more than one item at a time, unfortunately. Place 2 orders and use the code each time.

Yeah, it's kind of odd but there are a lot of stores where you can only buy one product at the time even. A serious pain in the ass if your intention was to purchase the DLC for some Paradox-esque game