Let's start this listing of unlockable cosmetics with Brick Bastion, which is a skin released back in Overwatch 1, during Bastion's Brick Challenge. As you probably expect, this challenge will most likely never come back to the game again, so you can already forget it if you are a new Overwatch player.
However, as Bastion has always been among the best DPS champions in Overwatch, we have seen lots of accounts on the free market that boast having this skin... and people buy them for crazy prices!
Doctor Ziegler Mercy
Doctor Ziegler is one of the rarest skins that people go crazy about because it was so popular in Overwatch 1, and you can't get it anymore; Blizzard replaced it with a Combat Medic Ziegler skin.
In this skin, Mercy dons a traditional doctor’s coat, a stethoscope, and glasses that give the hero a much more minimalist casual look than her usual costume. I especially love this skin because it is a nice take on the hero's background story.
Nano Cola D.Va
Nano Cola D.va is the main highlight of the cinematic short "Shooting Start" from the first version of Overwatch. The skin showcases a representation of D.Va’s backstory as a famous professional gamer, covering her mech and suit with the brand of Nano Cola. In my opinion, one of the best D.va skins ever released, and probably my favorite one out of all these rarest skins.
Flying Ace Winston
Flying Ace Winston skin was a limited-edition cosmetic that you could only get in the Overwatch League event back in 2018 for 200 Overwatch League Tokens. So, if you haven't played back then or didn't know how to get Overwatch League Tokens, the train is gone for this one.
Sadly, Blizzard will probably never release it ever again, and every Winston main will probably agree that Flying Ace is one of the best Winston skins, even better than a legendary Blizzcon Winston.
Pink Mercy skin came out as a collaboration between Blizzard and the Breast Cancer Research, and you can't get since May 2018. It was available for a limited time as a charity skin, and you could only get it if you donated for a good cause. That said, nowadays, most players will probably have to buy a new account to have a chance to play with it.
But honestly, Mercy looks like one of the hottest characters in Overwatch 2 with this virtual outfit. Like, this cutesy twin pigtail with matching pink ribbons and wings... Many players will probably pay lots of dollars just to have this one unlocked!
When I first saw this skin, I clearly wasn't prepared. So, Illidan Genji is basically a famous Demon Hunter from the World of Warcraft universe, Illidan Stormrage.
It was an exclusive reward to those who bought virtual tickets for Blizzcon 2019, and well, I guess if you were a Demon Hunter main in World of Warcraft, purchasing these tickets was a responsibility. Not doing so would cost you waiting 10,000 years for the opportunity to get it, and that's a much higher price than that for tickets.
Another Demon Hunter themed skin is Tyrande, Illidan's love. And just like Illidan, she was released as a Blizzcon 2019 exclusive skin, which you could get by purchasing tickets for the actual events.
Honestly, I love the idea of these WoW-related skins, they always add this weird specific vibe to the game. This one is a bit more blue in-game than on the picture, but it just looks so stunning in battle. But well, it's so rare that I've probably seen it once or twice after playing like 2000 games of Overwatch.
Next up, we have a real bomb – and this one is truly rare because of how old it is... as a Bastion main, I would love to have this one in my collection.
So, this one is a celebratory skin for Blizzcon 2016, and it features Blizzard's trademark color scheme. Just like the previously mentioned Blizzcon skins, you had to buy virtual tickets for the event to get it. Honestly, I have never seen it in a single game, and I won't be surprised if I won't... because, like, who played Overwatch in 2016?
Next up, we have Widmowmaker's unique skin in a paler carnation and a blonde hair. You could get it for free by logging in to Overwatch from March 6th to April 3rd, 2018. If you did, well, there is something to be jealous of! This one is not only rare, but it's so unique, and if you don't like Widowmaker's dark appearance, it can just save the day for you.
Lastly, we have Reunion Baptiste, a skin that you could only get by playing all the Baptiste's Reunion challenges in the first version of Overwatch. As some of you may remember, this skin was the main star of the game's short called "What You Left Behind".
Thanks to his helmet, the Reunion Baptiste has a very sinister look despite its white/cyan color scheme and cross sign. Again, this is one of those skins that look way better on the battlefield than on the picture... but you will probably never experience it in the battle because of how rare it is.