This is a guide to find some Easter Eggs and references.
The coordinates of the map are on the bottom right corner of the map images.
There are hidden names and images so you can see it for yourself.

Aquí está la misma guía pero en español
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3573093526

There are 4 hidden buttons with a sign that says don't press me

The first one can be found in Malca, near the Santa Muerte Idol



The second can be found in Pucara, next to Olico Super Dam



The third can be found in Koani, in the Uyuni salt flat



The fourth can be found in the burned forest of La Cruz

In the Uyuni salt flat, in Koani, you can find a couch that is a reference to Matrix

In Libertad, you can find an owl that explodes when you shoot it

In Caimanes, near the rebel shelter Caimanes Bravo, you can find a reference to Dark Souls

Operation: Archangel is a two-part mission featuring three characters of Rainbow Six Siege: Valkyrie, Twitch and Caveira



In the second part, at the end they mention Operation Patriots, which is a reference to the cancelled game Rainbow Six Patriots




When you finish the second part of the mission you get the Caveira gloves, which changes the takedown animation



In the loot boxes you can get skins of the characters of Rainbow Six Siege

In the second part of Operation: Achangel, in the house of Dengoso, you can find a suit in a closet that may be a reference to Hitman

There is a character from Splinter Cell in the mission Operation: Watchman, called Sam Fisher


You can wear the costume of Splinter Cell

In Operation: Watchman, at the end Sam Fisher mentions a soldier that wears a bandana, which could be a reference to Solid Snake

Operation: Oracle is a two-part mission featuring Cole Denholm Walker, another Ghost and future antagonist in Ghost Recon Breakpoint


When you finish the second part of the mission you get the handwear Executioner, which changes the takedown animation


Operation: Silent Spade is a two-part mission featuring John Kozak, the protagonist of Ghost Recon Future Soldier


When you finish the second part of the mission you get the backpack Optical Camo, which makes you invisible after crouching for a few seconds

You can also do this with the costume Future Soldier or the icon John Kozak

There are two costumes, Future Soldier and Lone Wolf (Walker's outfit)

In the second part of Operation: Silent Spade, at the end, Nomad says Cortana

In Barvechos, in Nidia Flores Hacienda, there is a tower that could be a reference to Assassin's Creed. There is also a cart with leaves next to the tower

You can wear the costume Assassin's Creed

In Libertad, in la Guarida de Tres Brujas you can do a ritual in which you have to activate three altars located in diferent places of La Cruz


The first is near Libertad


The second is in a swamp, near the burned forest


The third is on the lake near Libertad


After activating all of them you have to go to the village next to la Guarida de Tres Brujas and kidnap a cartel member guarded by soldiers of the same faction in a small church


Then take the cartel member to the cabin and knock him out in the center to complete the ritual

Go to the river in Inca Camina, find a rock with blood and interact with it. Then you will hear a roar and the Yeti will appear



You can also find its cave, near the Cable Car Station


This Easter Egg gives you two rewards, the Yeti's pants and ghillie suit

There is a very good guide that i have followed for this Easter Egg, i will put it here so you can see it for yourself

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1176550517

• (In the first step, graves have tools like shovels and pickaxes)
  
• (In the second, i think you have to kill every enemy in the mines)

This Easter Egg gives you the Broken El Tio Mask

In Inca Camina there is a sanctuary that can be completed if you collect 8 statues hidden around the entire map


There is a bug in which the statues don't appear, just exit the game and re-enter, your progress is saved each time you pick up a statue


It's in the sanctuary


Located in Koani


Located in Villa Verde


Located in San Mateo


Located in Malca


Located in P. N. de Agua Verde


Located in Libertad


Located in Inca Camina


Once you collect all statues, there will be people in the sanctuary, now decorated with candles

Funerary towers that exist in real life. In the game, you can find them in Mojocoyo


In real life, on the Llocalla river in the municipality of Yocalla, in Potosí, there is a bridge called El Puente del Diablo. In the game you can find it in Media Luna


The legend of Imaybé is very similar to the legend in the game. The tree can be found in Villa Verde


It’s a real myth. In mining areas, it is considered the god of the underworld, he brings protection to miners who give offerings and misfortune to those who don't. In the game you can find three statues located in three mines (there is also a recording)


It's a legend about the origin of the Uyuni salt flat, it is very faithful to the real legend. In the game you can find a "tear" in Koani


This legend is fictitious, but it's a kind of Easter Egg, it is a village where there are only dogs. It is located in Itacua


I couldn't find evidence that this is a real myth, but it works like an Easter Egg. In Caimanes, in a shack by a lake, you will see a child. If you get near him, he will run into a bush and disappear


There are some documents about real people

• Butch Cassidy and Sundance Kid
  
• Che Guevara
  
• Simón Bolívar
  
• Klaus Barbie
  
• Túpac Katari
  

There are some cosmetics that reference other Ubisoft games

I have probably missed a lot of Easter Eggs and references, but these are the ones that I could find.
In the legends section I have put some that seemed curious to me.
In the cosmetics section I have not put every reference, because I have not seen them or I don't know what they refer to.
English is not my native language, so I may have misspelled something.