The Ghost of Tsushima Sly Cooper Easter egg is actually the means to earning a trophy called Cooper Clan Cosplayer. To explain, Ghost of Tsushima has multiple pieces of armor and cosmetics you can equip Jin Sakai in that, when combined, turn him into a human ringer for Sly Cooper, the cartoon racoon rogue that headlined developer Sucker Punch's PlayStation 2 games.
Now, keep in mind that you cannot get all the required outfit pieces until you reach the third region of the map, so you can stop reading now if you haven't made it to Kamiagata yet.
How to get the Sly Cooper outfit in Ghost of Tsushima
In the image above, you can see Jin Sakai wearing the Sly Cooper combination. Sure, it's not perfect... but it's a decent attempt nonetheless. If you want to earn the Cooper Clan Cosplayer for yourself, let us break down what you need to obtain - a unique set of armor, a specific dye, a headband and a sword kit.
Gosaku's Armour
The first part you can obtain is Gosaku's Armour. This is obtained by completing The Unbreakable Gosaku, which is one of the Ghost of Tsushima Mythic Tales. You can start it when you reach Toyotama, the second region of the map.
Ocean's Guardian dye
Now you need to dye Gosaku's Armour with Sly's blue-and-gold aesthetic. Head over to any merchant in the second or third region of the map and look through their armour dyes. Ocean's Guardian will set you back 10 flowers.
Crooked Kama Headband
Next is the Crooked Kama Headband, which features an icon of Sly's classic cane. To get this, you need to go to Jogaku Temple (circled on the map below) then use your grappling hook to climb the corners, right to the very top. You'll find the Crooked Kama Headband blowing in the wind at the peak.
Sly Tanuki sword kit
Finally, you need the Sly Tanuki sword kit. This is also in the third and final region of the map, found at the Pillar of Honour marked on the map below. it's in the south-east corner of Kamiagata and is one of the harder Pillars to reach since it's almost like a Shinto Shrine trying to get there.
When you've got all of the required components, equip them and voila! The Cooper Clan Cosplayer trophy should unlock.
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