*Facepalm*

That was really sad. The way it started to beg for help really got me.

You see him in a cell while looking for Chen Lin. It's funny, I spared him out of mercy thinking it was the right thing to do. Then I saw him there suffering and felt really bad about my choice.

It took me a while and a visit to Neogaf in search of answer to fully grasp the game ending's implication. The idea was vogue when I finish but now it is explored and discussed and I'm finding I enjoy it more and more...

This diagram gives a relatively good theory that explained the details: http://www.abload.de/img/endingtimeline.2j7x4f.jpg

Head exploded!

If you beat 1999 mode with no dollar bill machines. You get ultra secret ending where booker and grandma elizabeth have an incestuous affair because comstalk brainwashes them and sends booker time to 1984, so comstalks plan still occurs.

:D. I did it, check my steam account, for proof. I couldn't possibly be lieing.

I spared him too because after becoming a total monster in Bioshock 1, I decided I'd be a good Booker in Infinite.

I just thought of something neat that goes along with the ending: When you're in the hall of heroes Slate goes on and on about how Comstock is glorifying himself for something he never did and at the point in the game you totally believe Comstock is taking credit for things he didn't do but in truth Comstock was at Wounded Knee but he was still Booker back then.

All the more ironic given Slate's desperate search for a clean death from a 'true soldier' rather than being brought down by a 'tin man'.

This was a very un-fullfilling ening.

It wouldn't work, cause there'll always be a Booker in some universe who goes there, just as there'll always be a Booker who goes through the baptism.   The only solution is to kill all bookers (Or just all the Bookers who decide to take the Baptism) and be left with the one, which is what Elizabeth did (I didn't really get that part from the ending, but apparently it was stated).

The reason why booker went to get baptised (And chose to or not), was because of what he did at the wounded knee. Truck's saying, since all the elizabeth's went back to kill a singular booker before the baptism. Why couldn't they go back before the battle of wounded knee and use find a singular booker and break his legs? Thus, booker wouldn't do the atrocities in the first place, and he'd have no motivating reason to get baptised or become comstock.

 Killing him, after the baptism, still let's the non baptised booker commit the atrocities at wounded knee. 

However, this does fit in the games "Constants and Variables". you can say booker being at the battle of the wounded knee wasn't a constant, and he would always do something dumb and thus want to go to baptism and decide (Constant). However, in the game it was presented as the underlying cause for the baptism. And if Elizabeth did go back and break bookers legs it could create a lot of other issues.

Elizabeth drowning booker creates a classic grandfather paradox that's been used in time travel things for years. The Elizabeth's can exist until bookers dead, however, if booker dies elizabeth never existed. The twist was underwhelming for me because it was essentially, grandfather paradox! Talk amongst yourselves and debate a grandfather paradox. It is suggested, that in infinites universe if a paradox is created, all those timelines get destroyed. 

As well as thematic complaints which I've addressed in this thread.

But there is an Elizabeth to kill him, there's a universe where this all happens.  Grand father paradox works only if there's one dimension.  There's not in this game, hence the name "Infinite".  The infinite amounts of Elizabeth kills the infinite amount of Comstock and was left with the lone Booker who could accept the Baptism.  Elizabeth still exists as long as he exists.  Booker chooses death and everything is reset, there are no more Comstock to take Anna which gives you the final scene.