Mass Effect 3 is the only game that depicts the Reapers invading a galaxy. Explain how Mass Effect 3's ambitiously underwhelming depiction is the fault of the entire series, and not just of Mass Effect 3. The way Sovereign acted in Mass Effect, and that it devastated the Citadel fleet by itself, one would expect the Reapers to be bristling with weapons and have an efficient plan. Rather than landing and firing the same single laser at everything they see. Also, HOOOOOOOONNNNNKKKKK.
It took the Reapers a hundred years to wipe out the Protheans, when they actually successfully sprung their Citadel trap and took them by surprise. We KNEW it was a slow, meticulous process. We also knew from ME2 that they wanted to harvest new Reapers from humans, so of course they didn't just Base Delta Zero the planet Earth. This is one of those systemic problems that had its seeds planted in ME1, but because ME1 didn't actually show or explain anything in detail (just alluded to a bunch of mysterious, vague things), we didn't get people whining about it until the sequels. News flash: 80% of the stuff people complain about in the story was there in ME1, they just hadn't revealed it yet.
And man, the Reapers DID devastate the human fleet in a short space of time. Did you miss that bit of ME3?
EDIT: And if you want to complain about the Reapers being inefficient, you're going to have to also complain about ME1, where Sovereign has been putting his plan into motion for a thousand years (Rachni war caused by Sovvy), allowing the Citadel races to gather strength the whole time. Then, instead of attempting subterfuge and infiltrating Citadel government with the easy-access that Saren provided by indoctrinating increasing numbers of agents and taking full control, he decided to wait decades after he first corrupted Saren, search for a Beacon that he didn't know was going to be there, have Saren interact with the beacon which he can't understand, go find the Thorian and get Prothean mental something something, chase down a missing Mass Relay, go to a secret lost planet, and all so that they can use a back-door to the Citadel which they didn't need because Saren had direct access to the Citadel for the past 20 years anyway.
They only need a back door onto the Citadel because Saren got busted as a Spectre, which he wouldn't have if he hadn't searched for the back door to begin with. LOL. The council meeting area where you talk to them? It's one foot away from the citadel computer Saren needs two minutes of access to in order to open the Citadel and summon the Reaper Armada. Whoops!
I think this is a huge problem with games today. If something doesn't make sense, is amiss or is too sensitive to get into details of, an answer awaits outside the game in a different medium. It is the idiocy or laziness of the highest magnitude and undermines the story and plot of a game that sells itself for as "story-driven".
I agree, but even ME1 launched with novels pretty much straight away. This has been a long time problem of the series that came to a head between ME2 and ME3 when the amount of ME EU stuff skyrocketed to fifteen thousand different comic series, a host of shitty novels and an animated movie.