--- Comparing ME3 to Chrono Trigger there just got me thinking of the characters of Chrono and Shepard. In a way, they were both blank slates. Chrono due to being a silent JRPG protagonist upon which we could project ourselves, but Shepard was more like a lump of clay for us to mold.
At the begining of Mass Effect 1, they created a universe and characters.
Garrus Vakarian is Male. He lives on The Citadel. He is a failed C-Sec officer. He wants to protect the innocent, with tendencies to go beyond the law. He is Heterosexual. He is unmarried. That was set in Canon.
Liara T'soni is an Asari. Asari are female Pansexuals. She is Blue. She is an Archaeologist. Her Mother is Matriarch Benezia. Liara researches Protheans. That was set in Canon.
Hannar are kinda Echo-y. They're Pink and Shimmering. They are funny, without trying to be. They worship Enkindlers. That was set in Canon.
But then Shepard. What's Canon about Shepard? Not much. Shepard is an amorphous blob. No assigned gender. No assigned history. No assigned sexuality. No assigned specific abilities. Shepard is Extra-Canonical.
Absolutes about Shepard: Shepard fights battles. Shepard carries guns. Shepard does not give in due to fatigue or injury.
As the games progressed, new content was occasionally Created, but anything surrounding the Canon was not created but rather made. Liara's father was revealed to be another Asari, as supported by current Canon. That fater was revealed to be a matriach bartender, as supported by current canon. Garrus' moving to Omega brought out his lore extra-legal tendencies, as supported by current canon. Blasto the Jellyfish was introduced, based on the Hanar being kinda funny, but not on purpose. Canon.
OCCASIONALLY something was created that bordered non-canon, but they tried to explain it away with Canon. We'd seen Cerberus' experiments on a small scale, we knew they were rich and Amoral in ME1. In ME2, when Shepard was revived by them, it stretched the Canon, but they said "It took them two years, with Supertechnology, and an insane budget. This was not easy to do. It was a Technological, Medical Miracle." We accepted, some grudgingly, but it entered into Canon: Cerberus can do shocking things like reanimate the dead, over long periods of time, with ludicrous amounts of money.
At the end of Mass Effect 2, the Human Reaper was introduced. Again, Canon was stretched. But we knew the Collectors worked for the Reapers, we knew that the Reapers had use of Organics for some cause, and it makes sense that things must reproduce themselves. Canon was stretched, as I said, but did not snap. It was explained away: the Reapers don't just kill people, they use them for various evil means. Either mindless soldiers like the Collectors or Husks, or to become framework for another of their kind. Their Unknowable purpose became a little more clear, but the Stealthy Abductions could go on indefinitely, making new reapers slowly and stealthily, so there's still no clear reason for total galactic extinction every fifty thousand years. Canon Snap avoided.
The Crucible was created for Mass Effect 3. It was not the extrapolation of existing Canon. But that's FINE: it didn't run against Canon either. There was no mention of Prothean Super Weapons before at all. Nothing said "There can not be a Crucible!" But then at the end, the Catalyst was also a creation. Not that there WAS a Catalyst: that was said outright within the game. Rather the NATURE and CHARACTER of the Catalyst. And it did go against Canon. The Reapers were unmade from their previous image. The Cycles were unmade from their earlier image. The Citadel was unmade from its earlier images (plural.) The very nature of all conflict was unmade from its very image. In the three choices, the Alliances I've made can be unmade from their images, the gameplay and choice system are unmade from their images, and all life can be unmage from its various images. Shepard, in reaction (or lack of!) was even unmade from his image.
Shepard before that was Odo from Star Trek DS9: he could fit ANY shape or situation. Then suddenly he's stuck in human form, and unlike Odo, he stubs his toe and SHATTERS like glass.
The End is not time to create. The Begining is time to create. Again I'm gonna get a little Biblical. "In the Beginning, God created the Heavens and the Earth." I'm sure that no matter what you believe, you've at least heard that. If you're an Athiest, replace "God" with "Coincidence" or "Eventuality," or "The Higgs Boson," or even "I'm not sure, but apparently something." The point is WHEN. In the Begining, Things got CREATED. After that, all that's happened is that things combine and make new things. "Hey bro, check it out, I've got some Hydrogen!" "Cool buddy, I've got Oxygen! OH SNAP, WE PUT THEM TOO CLOSE TOGETHER!!!" "Whoa, dude, I think we just made the basis for all life! SWEET!" All the way up to "Hey bro, if we make pathways for electrons on these silicon chips with varying resistances, we could create a system to preserve data electronically and transmit it to a visual medium of liquid crystal bubbles held between two films and represent it as light and color to simulate shapes and in that manner make a kick-ass third person shooter space RPG!"
You take what you have, and you make with it. You don't create at the end. Creating on a small scale in the middle is forgivable, since things aren't really fleshed out. I mean, I look (again, sorry) to the Bible and I see Moses parting the Dead Sea. How'd he do that? That's the Cerberus Lazarus Project moment. Just kinda gotta accept that with a stick that God gave him, Moses can make an ocean get out of his way, just roll with it, it's not that important to the overarching story and it makes for a sweet set piece. Now at the end here, that kind of stuff isn't really happening because if it did people would be praying "Hey, this ending sucks, it doesn't make any sense!"
Point again being that the longer a story runs, the more confined by its own Canon it becomes, and the more Grievous breaking that Canon gets. As the questions get whittled away and the answers stack up, there's always a tangible FEEL that the ending of the game is approaching. I call that the Forgetting Point; traditionally as I feel the end of a game approaching, I scramble to do the side quests and then put off finishing the game, not wanting it to end. Sometimes I forget to go back, for years occasionally, and then start from the begining. A second first time through, if you will. With Mass Effect 1, I didn't notice the Forgetting Point. I was caught up in the action. And when I realized I saved over my games while on Ilos and couldn't go back to free-roaming space sidequest mode, wasn't annoyed that I had to start over. I had new options. With Mass Effect 2, I also missed the forgetting point, but here I boned it up and thought that the standard "This is the end of the game" speech that Miranda and Jacob gave me meant to go do all my sidequests now, when they REALLY meant to end the game NOW or my crew would be ground up into Torgo's Executive Powder. My first playthrough I had to watch Kelly get blendered. I didn't go back and undo that ****-up; I used it as fuel to be even more brutal to my enemies on my SECOND playthrough.
Mass Effect 3 also doesn't have a Forgetting Point. The attack on the Cerberus Base feels like it might be that "End of the Game Incoming" moment, but then it rushes you into London and that weird "Dialogue Bowl" base, and then the Conduit, and then... yeah. And then we get new creations that slice the sides of the Canon and all the understanding runs out all over the floor, and you look for the moron Stock Boy who didn't read the stamps saying "Do Not Cut: Canon Inside" all over the box. It's this weird moment that you get disconnected not just from what's happening now, but from everything that happened before. And you're like, "What?"
Aside from the advertising lies, aside from the emotional disappointments, the ending really does a disservice to the rest of the work itself. I mean, it was an impecable tower, each level built upon what went before. Occasionally they tried to change the building materials, but at least reinforced those sections against failure. Then at the top they used Sulfur instead of Bricks and instead of Mortar they used Napalm. And for good measure put a big Magnifying Glass over it.