Hyper-space said:
This is why we cannot have nice things, for we set up these absurd rules for video-games that only serve to permeate clichés and tired tropes, such as the Hollywood-esque notion that a movie (or in this case, Video-games) should only have happy-endings.
Wrong. It's Mass Effect 3 itself that sets up the expectation that there is a happy ending hidden amongst all the endings.
- The Military Strength system, along with the fact that the series (not to mention the genre) is based on a 'choices matter' paradigm, sets up the expectation that players can have a happy (or at the very least semi-happy) ending.
By giving us a way to track our military strength against the Reapers (even labeled with a big fat "Minimum" indicator) it encourages players to bust their ass off, do every side mission, play the galaxy at war multiplayer (or Mass Effect Infiltrator on iOS) and probe the entire galaxy for war assets, and therefore automatically creates the expectation in us that we can have a happy or semi-happy ending.
- Throughout the game series, the game creates the expectation that - as far as happy endings go - there are at least one of three ways the series has a happy ending:
1) A happy ending for the galaxy (which doesn't necessarily mean Shephard survives)
2) A happy ending for Shephard
3) A happy ending for Shephards crew/teammates (which also doesn't necessarily mean Shephard survives)
The way the game sets up those expectations are multiple and happens across all three ME games, but i wanted to mention one in particular: ROMANCES.
Romances indicate that Shephard are fighting for a future with his love interest, and therefore sets up the expectation that Shephard and his love interest actually has a chance to see a future together. I've read several forum posts that explains that, on Rannoch, the conversation between Shephard and Tali about returning to her home to live had people dream up an ending movie or real-time cutscene with (male) Shephard and Tali building a home together. If you ever get through the Baldur's Gate series with a romance, this would also be reflected in the epilogue that you had a future together.
But it turns out that players get disappointed on both 1, 2 and 3. No matter what you do, the Relays are destroyed, isolating the entire Galaxy - not to mention the other consequences that might also affect the galaxy (for example the synthesis forced DNA resampling for everyone if you picked that), as well as the destruction the Reapers have already caused. Shephards crew gets stranded in every single ending, and Shephard bites the dust in almost every single ending (and the one where Shephard survives is neither consistent nor convincing, and doesn't change the fact that Shephards love interest is stranded far away from Shephard).
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So in short: Even if those "absurd rules" you are talking about (which i would like to point out aren't absurd at all. They are common sense, and were created exactly to
avoid endings like the one in ME3) didn't exist, the game would still have been ripped on for it's ending, because the expectations the ending fails to live up to aren't based on absurd rules of any kind: They were set up by the games themself.
It's perfectly possible within the rules you mention to have an exciting and interesting story which ends on a high note and leaves people satisfied. It's the same reason Submarines are made of metal, not of bread.