Terraria has 13 bosses each with there own unique fighting style.
Bosses
King Slime Eye of Cthulhu Eater of Worlds
Brain of Cthulhu Skeletron Queen Bee
Wall of Flesh
Hardmode Bosses
The Destroyer Ocram Skeletron Prime
The Twins Plantera Golem
King Slime Eye of Cthulhu Eater of Worlds
Brain of Cthulhu Skeletron Queen Bee
Wall of Flesh
Hardmode Bosses
The Destroyer Ocram Skeletron Prime
The Twins Plantera Golem