The first Pyro unlockable is The Flare Gun, which replaces the shotgun. It allows the Pyro to ignite an enemy at long range, but does require careful aim on their part. It’s particularly useful for causing havoc on Snipers and Engineers who want to keep their distance.
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The second Pyro unlockable is The Backburner. This flamethrower is built for the Pyro who likes to ambush their opponents. It removes the compression blast capability, instead guaranteeing critical hits whenever it’s used on an opponent from behind. To aid in survivability, it grants the Pyro an extra fifty health.
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The third Pyro unlockable is The Axtinguisher. This mighty axe guarantees critical hits on any enemy that’s currently on fire, although it’s significantly weaker against enemies who aren’t. A great combination with the The Flare Gun, or with another Pyro buddy riding alongside doing the igniting.