

Obviously in SAO anyone who was in the game on the first day was trapped
inside. My question is, could someone on the outside a day (or whenever) later
join in?

I would imagine it would be tempting for someone who had a significant other,
child, someone, in the game or maybe they were depressed and thought SAO would
lead to a better life.

I'm sure they would then become trapped themselves but is there anything
stopping that initial jump after Akihiko Kayaba already trapped everyone?


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sword-art-online
Can people log into SAO after the initial trapping?


There's no evidence to show that it wasn't impossible for non-trapped players
to gain access into the game. What Kayaba Akihiko did was removing the "Log
out" option and altering the game so that the death flag would cause the
NerveGear to fry the player's brain.

Of course, whether it was possible or not on the basis of what Kayaba did to
the game is one thing, the other factor to consider is the authorities.

When Kirito first entered Sword Art Online, he was on his bed. However, at the
end of Aincrad arc, he woke up in hospital as seen where he wakes up and
stumbles out to look for Asuna.

![Kirito post-Aincrad](https://i.stack.imgur.com/ZsqLz.jpg)

It was also mentioned that the
[NerveGear](http://swordartonline.wikia.com/wiki/NerveGear#Chronology) has
it's own internal battery in it which accounts for 30% of it's weight, in the
Novels it's revealed this battery has atleast 10 minutes of power in it being
one of the conditions set to kill a player.

> In the novel, Kayaba announces to the players that if one of the following
> happened: **being disconnected from a source of electricity for 10 minutes**
> , cut from the system for more than 2 hours, or dying in-game, the NerveGear
> would fry the player's brain, killing them in the real world.

Soruce: [Episode 1 - Adaptation Notes (Point
2)](http://swordartonline.wikia.com/wiki/Episode_1#Adaptation_Notes)

Kayaba also says how people outside the game were told to avoid forceful
removal of NerveGears yet some chose to ignore this (though it doesn't imply
he cared for their lives).

> Having informed the outside world of the situation beforehand, [Kayaba]
> reported that friends and family members of some of the players had already
> ignored his warning, causing the death of 213 players, showing images of the
> SAO incident.

Source: [Episode 1 - Plot (7th
paragraph)](http://swordartonline.wikia.com/wiki/Episode_1#Plot)

Also every trapped SAO player was moved to hospitals within the first 2 hours
of the game starting as a respone to Kayaba's announcement to monitor their
condition, and for those who didn't die in-game, to keep them from becoming
under-nourished.

> He also told them that his crime was being broadcast all over the world,
> with the location of each player, thus the authorities would be moving them
> into hospitals to put them in better care during the 2 hours he had allowed
> the players to be disconnected from the system.

Soruce: [Episode 1 - Adaptation Notes (Point
2)](http://swordartonline.wikia.com/wiki/Episode_1#Adaptation_Notes)

In the Novels, to which the anime does not mention, SAO was only released in
Japan so the only players effected were Japanese. in the Wiki it says that
_after_ the SAO incident
[NerveGear](http://swordartonline.wikia.com/wiki/NerveGear#Chronology) had
been seized and disposed as according to [Japanese Code of Criminal Procedure,
Article 121](http://www.kl.i.is.nagoya-u.ac.jp/told/s23a13101je.2.2.txt)

all of this indicate that the Japanese Authorities were well aware of what was
going on and would be in the public's best interest to prevent any more cases
of players being trapped inside. in terms of the game the Authorities didn't
need to stop people getting more copies of the game as only 10,000 copies were
first produced and 10,000 players were trapped1

> Only 10,000 copies were printed in the first batch of the game, and online
> sales sold out within seconds. Hard-core gamers waited in line for days to
> purchase the first few hard copies from many stores.
>
> «Sword Art Online» officially started server service at 1 PM of November 6,
> 2022 and obtained infamy when the creator succeeded in trapping 10,000
> people in the game, and making it so that death in-game would mean actual
> death for the player.

Source: [Sword Art Online -
Background](http://swordartonline.wikia.com/wiki/Sword_Art_Online#Background)

however on the NerveGear Wikia page it states there were about 200,000 players
in possession of a NerveGear, so i assume that the authorities seized about
193,853 NerveGear _during_ Death Game (3,853 from the player who died)

* * *

This next part is mainly speculation. However, Cardinal system, which could
possibly corrected new players entering the game, since we didn't see outside
authorities trying to help players in-game with clearing all 100 floors.
though this could be them being cautious as effectively Kayaba was in control
of 10,000 lives

It is also mentioned that Kayaba has a level of honor and fairness so i would
assume that as he aided players to reach the 95th floor (where he would reveal
himself as the final boss) he would also act on any outside interference
against anyone in some way if they came up with hacks designed to help beat
the game or attempt to back into the game itself.

> Akihiko had a level of honor and fairness. He designed Sword Art Online to
> be a beatable game by anyone who had the skills. He never interfered with
> the players' progress to keep them from advancing through the game; in fact,
> as Heathcliff, he was actually fighting on the players' side, helping them
> clear floors. The one exception to this is the fact that he made himself
> invincible until his battle with Kirito, although this was necessary to
> survive the game until the 95th floor was reached, where Heathcliff planned
> to reveal his true identity and become the final boss on the 100th floor.

Soruce: [Kayaba Akihiko - Personality (4th
Paragraph)](http://swordartonline.wikia.com/wiki/Kayaba_Akihiko#Personality)

* * *

1: the web version of the story which included the adult #.5 chapters says
there were 50,000 players trapped


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@Azrael response is the proper response to this, but regarding whether they
could or not outside of the initial units and other units were confiscated,
Kayaba probably closed off the system/server since Govt or someone could hack
in or hijack packets if they wanted to (happens now with MMOs). Even Sugou who
wanted people for test subjects could only do it when they logged out which
means he couldn't just penetrate the server and was waiting for it to open up
to reroute 300 people to his own.

To add to this the new units in Fairy Arc were already in production and
couldn't physically fry anyone's brain. People would have just used this to
log in and communicate with those who are trapped but that never happened.


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The answer are in the first episode of the series. Only 10 000 copies of the
game are sold, and all of them are in use, because in the presentation, when
Kayaba told her all of the "new rules", there are more than 9k players online,
and some are dead at this moment.

Also, I can understand other explanations are correct, because yes, probably
the "login server" is down, or there's only a hidden server (neither series
nor the novel said anything about if Kayaba can logout or not).

@Quikstryke: They cannot hijack packets of the server. I explain: all these
players are in controlled environment, because of this, you can sniff the
information between NerveGear and the servers. But, you don't know the use of
these data. When you do a sniff on an MMO, you are playing the MMO itself.
Because of this, you view a packet going to the server or from the server and
the effect of this packet on your screen. If you receive a bunch of packets,
but you cannot relate it with the proper actions on the game, all these
information are more or less useless. More, if these information are
encrypted. If you have 5 packets, for example, you can try to relate itself
with actions (for example doing one more time the same action for view common
packets). But, if you have thousands of them, you don't have nothing.


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I came here because I wanted to know people's opinions on the matter. You are
all sticking to the fact that only 10,000 copies were made and all were being
used. While this is true, I think that we shouldn't go on facts for this. I
believe we should theorize and just get away from the fact that all copies
were in use. Let's say that about a hundred or so never logged in on the first
day. Would they be able to log in if they still had the copy of the game?
While we are at it, let's take away the whole thing about how the government
would confiscate those copies as well. Also, let's put people's reasoning
about joining a death game aside.

So my answer to this is kinda going to be everywhere.

Alright, I believe that in a way, they could. I mean, look at how the game was
set up. Let's start with the Beta of SAO. Everything is great; a few bugs here
and there, but everything is running smoothly. Now for the Full Version. The
game was specifically modified to not have a "Log Out" button. So the people
that joined SAO on day 1 already logged in while the game had no "Log Out"
button in the first place. So there goes that theory about people not being
able to join after the "Log Out" button was removed. Right now it's looking as
if they might be able to. Now let's go into the game's system, Cardinal. The
Cardinal system is SAO's whole system and does a number of things. It would
also adapt to situations. Let's say one of those things is to make the game
fair for everyone. Would it not block out any other people from entering
because everyone had a head start? It would possibly try to send them to
another server for when the game had multiple of them. But then what about the
Beta Players? They are ahead of everyone; would that not be the same as if
someone new joined? So there goes that one. It would go without saying that
nothing is standing in the way of a person from joining. The servers wouldn't
be full, so people could still join. Unless the guys that worked on the game
made it so that no one could join. But with that said if they had that power
to do so, then wouldn't they be able to pull everyone out of SAO? It's most
likely that Kayaba was the last person to check the systems before release, so
he could have made changes to the game that the others didn't notice. Or maybe
Kayaba was the last person the game went through before release so everything
would be set up the way he wanted it to. It would also go without saying that
only Kayaba could access the game, as we learnt that he was actually playing
himself. Now, there's another thing we have to consider. I believe Kayaba
would not have joined SAO on day 1 either, other than his appearance at the
opening ceremony. I believe that he would have joined after the first month or
so to ensure that everything was going well without him interfering. Also,
what's to say that Kayaba thought about people not joining on day 1 and didn't
bother to put a restriction on it? He did want everyone to join so that he
could control a world by his design. So the reasoning stands that yes, they
could join and be trapped there like the others.

That's my theory, but something else bothered me as well. For this, I am
bringing back the rule about the government confiscating the copies. If these
copies of SAO were usable, would the government not try to find a way to get
everyone out by looking at the game's codes and crap? This was most likely a
thought in Kayaba's mind. So he probably did put a restriction on new players
joining. Now with that in mind, Day 1 would have been the only time to join,
unless you're the GM. Joining on any other day would result in a connection
problem. So if we add in that one little detail, then the whole answer turns
around. So it varies on different occasions, but my final answer is no.

Now don't go hating on my theory as this was actually my first theory that I
have thought of myself. And I'm sorry in advance if any of it does not make
sense as it is very late so I'm tired and I've spent like over an hour writing
this.


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Just finished watching "Sword Art Online Alternative Gun Gale Online", in it
you can see that Pitohui wasn't able to participate despite being a Beta
tester, although it doesn't say weather she had purchased the game or not but
been who she is (and rich), she might have had the game in hand already, plus
I can't imagine the developers not giving beta tester priority in the purchase
of the game. So based on my own speculations, I believe the "login server" was
disabled by either Heathcliff or the government.


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