Firstly, we should define alternate:
occur in turn repeatedly.
"the governorship alternated 8etween the Condescension and her heiress”
synonyms: 8e interspersed, occur in turn, rotate, follow one another;
every other; every second.
"she was asked to attend on alternate days"
synonyms:every other, every second
taking the place of; alternative.
"the rerouted traffic takes a variety of alternate routes"
a person who acts as a deputy or substitute.
In this case, we’re talking about both the noun and second adjectival form of alternate. I’m going to assume that you also have no knowledge of other timelines, or of the Game. Now, the “Game” is a construct that chooses certain “Players” to 8ecome part of its mainframe. However, once the players enter the Game, the rest of their planet/universe is wiped out. The Game will then conduct its chosen mem8ers through a series of challenges, designed, I 8elieve, to whittle down the selection even further. At the end of the game is supposed to 8e a new Universe, one for its Players to live in (the ones that survived). However, those that didn’t survive will wake up in the afterlife the Game has provided; this is a holding area du88ed the dream8u88les. That’s where I live. (If you’d like more information on that, read my little explanation on it here.)
Another way that the players may depart from the living is if they do something the Game deems deleterious for their growth. Then the whole timeline of said players will 8e classified as Doomed. This means that everyone that they’ve known, interacted, and grown up with will, eventually, die. This means that no one will 8e left to finish the Game (to perpetuate the Universe’s goal). Are you familiar with the theory of Quantum Physics? I’ll just give you a short overview just in case. The 8asis of Quantum Physics (or at least the part pertaining to what I’m discussing) is that for every choice made, a multiplicity of different Universes split off for each additional option. Sort of surrogate Universes, so to speak. These Universes in turn split off, creating an infinite num8er of them.
Now, the reason this is applica8le is that that is the method the Game (aka the Universe(s)) applies. If a Player or group of Players chooses something that the game doesn’t ‘approve of’, then a new Universe will split off where that choice is not made. Of course, any minute decision could result in this, which means that there will 8e a verita8le plethora of alternate Universes, and therefore people. However, one will, in general, not interact with them unless and until one dies (or loses 8oth of one’s dreamselves), and su8sequently enters the dream8u88les.
While I am an alternate (technically we all are) I am not one of yours. I am actually the alternate of your descendant/ancestor, which is a discussion for an entirely different day. I assume you are familiar with Mindfang, your ancestor. I am, in a way, an alternate of her. I am how she would have 8een had she grown up in a different environment. Not nearly as cool, I know.
Anyways, I hope that was sufficient for now, even though really I only 8arely skimmed over most of the topics involved. I can give you a more detailed account, if you’d like!