If you haven't watched all of Squid Game by now then what have you been doing with your life.
The shocking Korean horror survival series has captivated viewers and is set to become the most-watched Netflix show ever - even beating popular period drama Bridgerton in the viewing figures.
What started out as a a group of people enjoying a fun children's game turned into a bloodbath as the players risked their lives and turned on their own friends to win an enormous cash prize.
That explosive twist ending proves that nothing was done by chance - and eagle-eyed viewers have been spotting clues of foreshadowing throughout the nine enthralling episodes.
Clever fans have also started coming up with their theories, from Seong Gi-hun's possible connection to Oh Il-nam to how the players and workers were decided in the first place.
Warning! If you haven't seen the entire thing then probably best to stop reading now as there will be plenty of spoilers below.
Deaths were all foreshadowed
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Aside from Gi-hun, most of the players we came to love meet a grisly end.
We were kept on the edge of our seats trying to work out who would survive each challenge, but how each character would die was staring us right in the face.
While gruesome and heartbreaking, many of the deaths were actually quite poetic when you think about it.
The most devastating of all was poor Ali, who was tricked into giving his marbles away to best pal Sang-woo and then shot dead.
The sight of trusting Ali's face when he realised his devious friend had switched his marbles out for stones will haunt us forever - and the only saving grace is we didn't actually have to see him die.
Back in the second episode, we saw Ali going to his boss to ask for his wages, then try to take the money from him which ended up with his fingers being caught in heavy machinery.
Desperate Ali then picked up the envelope of cash and ran away, just like how Sang-woo stole his marbles during the playground game.
Another death is foreshadowed on two occasions, so really we should have all known how Jang Deok-su would meet his maker.
The gangster was warned by Han Mi-nyeo that she would kill him if he ever betrayed her - and that happened when she pulled him to death off the glass bridge.
The bridge itself is also relevant as Deok-su jumped off one to escape the gangsters who had come to kill him in the outside world.
That time he fell unharmed into the water below, but during the game he plummeted to his death on the concrete bellow the glass walkway.
North Korean defector Kang Sae-byeok would do anything to protect her family and needed the money to smuggle her parents out of the country.
When the man who was supposed to help her said he had been conned she didn't believe him and held a knife to his neck.
So it was somewhat ironic that, while lying in agony after having a massive piece of glass stuck inside her, she had her throat slit by Sang-woo.
Speaking of the traitorous man, he was going to kill himself in his apartment before he heard a knock at the door and picked up the card with the number for the game.
Sang-woo then took his own life in the final game so that Gi-hun would be declared the winner - asking him to look after his mother.
The games were on the walls
Well this one isn't actually a theory as it's there in black and white.
As contestants started to be killed we saw their beds being removed from the room they live in - which meant something started to emerge on the walls.
Hidden behind all the bunk beds are drawings on the walls indicating what games were going to be played.
From the glass steps to the final Squid Game, the whole schedule is up there for everyone to see had they been a bit more aware.
Anyone who worked it out would have had a massive advantage, choosing an easy shape in the honeycomb game and a strong team for tug of war.
It's a shame no one went to have a look around.
How players and workers are chosen
Clearly everyone involved in something as barbaric as these games is in a pretty desperate place.
But who decides whether the people they recruit become players or workers?
As becomes clear, the workers are also willing to risk everything to get some cash as they start selling body parts and risk the fury of their bosses.
One convincing theory doing the rounds is that the shady salesman who recruits the players actually gives them the choice during their first meeting.
He asks Gi-hun whether he wants to be red or blue before playing the card game - giving him a slap or 10,000 won depending on the result.
It seemed like the decision didn't matter, but maybe it was incredibly important indeed.
Some viewers have speculated that those who pick blue become the players, as the tracksuits they wear are a similar colour, while those who choose red are employed as the masked guards in their red outfits
Oh Il-nam is related to Seong Gi-hun
One of the closest bonds we saw on the show was between Seong Gi-hun and Oh Il-Nam.
The pair developed a strong friendship and we discovered they had a lot of similarities, so some viewers believe the pair might be related.
When Gi-hun turns down the milk, chuckling Il-nam says his own son was "just like him".
The pensioner also gives Gi-hun his 001 jacket to "protect him" by making him not seem weak to other players, but perhaps this was more of a signal to the guards.
During thew marbles game they both state that the neighbourhood they used to grow up in is strikingly similar to the fake one they find themselves in.
But perhaps most convincingly, she says: "When the old man lost his memory and asks 'What's the date today? Is it the 24th?' He says it's because his son's birthday is coming up."
When Gi-hun tried to guess his mum's pin number at the start of the first episode, he tried his birthday, entering 0426 - or April 26 - which could align with the date of his son's birthday.
Could the games have been a way of Il-nam finding his long lost son? We see Gi-hun's mother but nothing is said about his dad.
Or maybe Il-Nam just wanted to play childhood games with his son because he missed out on it while he was growing up.
The workers are previous players
There are a lot of theories going round about the Squid Game workers.
It's not made clear how they came to work on the island and exactly how much they know about what's going on behind-the-scenes.
They also seem very comfortable with killing people, not hesitating to shoot them if they fail at any of the games.
This has given way to the theory that the guards are actually previous players, which is why they have no problems with killing others because they have already experience the horrors.
This would make them much more immune to feeling emotions when ending the lives of the players - and they would know the consequences of failing to obey the bosses.
However, what would be the need to go back if you had won billions? Clearly those involved in the games are bad with money so maybe that spent all the cash.
Supporting this theory is that detective Jun-ho’s missing brother, In-ho, is a former player who turns out to be running the show as the Front Man.
We also know that Il-nam was tracking the players who decided not to return to the game after it was cancelled following the vote,
But those people still have serious financial problems to deal with, so maybe he lures them back with the promise they will be workers rather than players.
That would also make sure they don't speak to anyone about his sinister operation.
The games were rigged
Despite being arguably the weakest of all the players, Oh Il-nam managed to make it very far into the competition.
And he would have gone either further had he decided to continue in his own game as he was on the verge of defeating Gi-hun in the marbles game.
At the start it didn't seem like Il-nam would last very long due to his age and illness.
But in Red Light, Green Light he was the first contestant to start moving forward after hundreds of people were shot dead and had a massive grin on his face.
Some viewers have claimed he was still moving when the killer robot doll turned around, so maybe he was never at risk during the first game.
When there is a chance he may be killed during the deadly night time riot he mysteriously goes missing, then appears shouting that he is scared on top one of the other beds.
How did he manage to climb up there in his condition? And it's also quite convenient the guards immediately rushed in straight after he exposed himself.
The other more obvious point is that the old timer had a hand in picking all the games so obviously went for things he is good at.
Although, even with his impressive tug of war tricks, it remains a mystery as to how his team managed to out-muscle one filled with big strong men.
There are other Squid Games
The game we saw could just be the tip of the iceberg.
We know that Oh Il-nam and his rich friends started up the games because they needed some more excitement in their life.
And we saw police officer Hwang Jun-ho go back through all the records looking for his brother, so they have clearly been going on for some time.
But a rather frightening thought is that there are many other games going on around the world at different times.
Most of the VIP guests had American accents so it at least stretches across the Pacific - and one of them pointed out the South Korean version was one of the best.
It would make sense that Il-nam's concept has spread with other like-minded individuals taking advantage of people for their own amusement.
As viewers, this is an exciting prospect as it sets up spin-off series that take place in different countries.
Imagine a British version with playground games such as Bulldog, Hopscotch, Tag and Conkers.
Seong Gi-hun will return
After spending a year barely living at all and spending none of his winnings, Gi-hun overcame his demons after discovering the truth about Il-Nam's identity.
He finally starts splashing out the cash and, in a clear sign of a change in his mentality, dyes his hair bright red.
Then just as he's about to board the plane to go see his daughter he decides to stay in Korea and seemingly head back to stop any more games taking place.
In Korean culture, the colour red represents masculine energy and many fans believe this is a symbol that he has gained some control over his life.
There is also the theory that Gi-hun dyed his hair the same red colour as the suits the workers where to indicate he will go back undercover to get revenge from within the organisation.
*Squid Game is available to watch now on Netflix
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