Dungeon Defender's TF2 Pets

"The Medic was planned to be a pre-order bonus to those that bought the game on Steam, however it is now available to everyone who buys the game on Steam, regardless of purchase date. Upon entering the Tavernkeep for the first time, there will be two crates containing your bonuses; one of these will contain the Medic (as well as the other three TF2 familiars)."
Dungeon Defenders Wikia.

it "was" supposed to be a pre-order bonus. But everyone have it now >.<. Make's me feel like pre-order was not a good idea. also , they're not that good.

Does this include if you got the game through IGN Prime?

You get them once you first start single player or online in your own tavern and you see two crates that contains Tf2 pets

You need to have bought the game through Steam, not any other sites.
If you did buy it through steam, check the back/side of YOUR tavern near the stairs for two crates.

hehe, that sounds cool