Mass Effect 2
I'm trying to keep track of what every major or semi-major political player is trying to do about the Reapers in 2185 before, during or after Shepard waltzes in, pirouettes into them then fucks off, and it's kinda mind-boggling.
Major players with their own agendas include but are not limited to :
the Reapers, who may or may not have been already traveling to the galaxy at this point, and are using their pawns - the Collectors - to siphon many humans to their base to get going on the baby-making. Beside assassinating Shepard in 2183 to one-shot an anti-Reaper coalition in its infancy, the Collectors are presumably prepping Omega for collecting (see also : Mordin's recruitment mission) and have contacts with at least one non-Reaper operative (the Shadow Broker) to facilitate their plans.
Cerberus, which has set up one operator cell to deal with the Collectors, and is completely reshuffling its structure to gear up for the incoming Reaperocalypse.
the Shadow Broker is aware of the incoming Reaperocalypse and is actively collaborating with the Collectors, though to what extent is unknown ; one thing we do know is that he uses an agent embedded in Cerberus (Wilson) to try to kill Shepard before they can be up and about. We also do not know how his manipulating of events behind the scenes is meant to benefit the Collectors/Reapers. Then the Shadow Broker gets replaced by Liara who leverages the exact same network and resources to do the exact opposite, preppin' the galaxy against the Reapers. EDIT : I should note that the yahg Shadow Broker planned to attack Cerberus in retaliation one year after Shepard's resurrection, and those plans included the assassination of the Illusive Man, the destruction of Cerberus as a whole, and, if possible, the recruitment of Miranda.
the Alliance itself is doing shit all to prepare against the Reapers because they don't believe it's a problem, but within the Alliance, Hackett is running an undisclosed number of operations to prepare them against the Reaperocalypse.
officially, the Citadel Council dismisses this "Reaperocalypse", but in reality they're very aware of that, presumably doing something about it off-screen, and not keeping some very important people in the loop, such as : Shepard, and seemingly Anderson and the Alliance as a whole.
Also not kept in the loop : the Turian Hierarchy, since they learn about the Reapers from Garrus' dad. Oops.
Actually in the loop : the STG, and presumably the Salarian Union as a whole, since Mordin has been authoring studies on indoctrination and the military has been developing stealth dreadnoughts.
The geth have quit their self-isolation and sent a unique platform past the Perseus Veil to ascertain what the hell is going on.
The geth heretics, meanwhile, have been losing the war against the Systems Alliance and reduced to sporadic offensives in three clusters, but they're preparing an indoctrination-like virus to take over the orthodox geth and add their numbers to their own to service the Reapers.
And these are just the players we know about. We have no idea what, if anything, the asari or the batarians are doing (or know) about the Reaperocalypse.
But that's just what everyone is doing about the Reapers. You've got massive political and strategic things gearing up on the side : we all know about the intense situation in the Migrant Fleet, but did you know the Blood Pack was setting up an invasion of Illium ?
