What is the meaning of って, っけ and んでした in this phrase “完のゲームって、どうなったんでしたっけ”


Context:  
I found this phrase in the comment section while I was seeing a video
regarding the new switch version of Oregairu Zoku.

Questions:  
I grasped the meaning of this phrase, that should be something along the lines
of “What happened to the game of Kan?” Or at least this is what I think.

However, I have a few doubts:

  1. って, from what I know, equals to the particle と in casual conversation, but what does it mean in this phrase, what is it quoting? Is it used instead of は or as some kind of contraction?

  2. Here んでした is the past form of のだ? Why is it used in the past form? And what is its meaning in this case? (is it used just to add emphasis and to show the curiosity of the speaker towards the answer of the question?)

  3. っけ From what I know it means that you are trying to remember or recollecting something… Is it used to show that he’s thinking back when he saw the release date, the video or the news regarding the game? What is its nuance here?  
And if the phrase means “What happened to the video game?” isn’t it the same
of “完のゲームって、どうなったの”?

P.S. This is my first post on this site, so I want to apologize in case there
are mistakes, the title is wrong, the message’s body is too short/long/poorly
shaped, etc.




って is often used in casual speech to start commenting on or asking about
something. It plays a similar function to は but doesn’t have the contrastive
sense of は.

In plain style, the following are both possible.

> どうなったんだっけ

> どうなったんだったっけ

Though they are practically interchangeable, there is a slight nuance. The
second sounds like the speaker is simply wondering or trying to remember a
conclusion that was already made in the past, whereas the first could be used,
depending on context, to ask about, or ask for, a pending decision, as when
spoken by a boss to demand reporting from a subordinate.

In polite style, however, only the past tense sounds natural.

> x どうなったんですっけ

> どうなったんでしたっけ

どうなったの is the plain version of どうなったんですか and is a direct question to the
listener. っけ makes it sound like the speaker is half wondering to his/herself
and half expecting an answer from the listener.

> 完のゲームって、どうなったんでしたっけ。  
>  I wonder what(ever) happened to the game of Kan. (Do you know?)

In this context, it is not necessarily the case that the speaker forgot
something he/she once learned about the game. It could as well be that he/she
simply doesn’t know.

