This page of the Far Cry 6 guide contains a walkthrough of The Lion’s Den operation.
You will learn how to get to Anton’s mansion and where Clara is.
You’ll have time for them later, so you won’t miss a thing.
It’s located east from the island’s capital.
You must examine the plaque at its base, as shown on the picture.
Reach Castillo’s mansion
The entire mission is seton Castillo’s private island, Isla Del Leon.
You’ll have to use a climbing kit along the way.
In the first spot shown on the picture above you need toswing on the rope and jump across.
You don’t actually need to climb it.
Watch out for the string trapshown on the picture above.
Carefully approach it while crouching, disarm it and proceed.
No one else should come here, so the body won’t be found.
Ignore the mansion gate for now, it’s locked.
Inside the small building you’ll find anaccess card - Estate Master Keycard.
With your newly acquired access card you might return to themansion’s main gateand open it.
You’ll pass a checkpoint, so you’ll start off from here if you fail.
Find Clara
you oughta keep sneaking in the estate, as you still can’t be detected.
Furthermore,the disguise no longer has any effect hereso you oughta stay away from the enemies.
you could climb the hill next to the mansion to do some recon.
You’ll need to explore theleft side of the mansion(looking from the starting point).
Wait for the patrolling guard to move away and reach the vines underneath the balcony.
Climb up them, get on the balcony, then use the ladder to get to the roof.
You’ll see a long, important cutscene.
Secure Anton’s villa
It’s time for agrueling battle in Anton’s mansion.
You’ll be able to lean out and gun down enemies on the lower courtyard.
During this encounter you have to fight the special forces.
Thankfully, you’re free to use all the weapons acquired throughout the game.

Aside from soldiers you’ll also encounter at least one helicopter flying above the villa.
Take advantage of the fact the inner courtyard features plenty of cover you’re free to hide behind.
Later in the fight you should reach the lower levels.
Use heavy weapons and rely on the radar to avoid ambushes.
Fight on until you defeat all enemies, triggering a few new cutscenes.
You will now automatically progress to the final operation of the game -The Battle of Esperanza.
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