Mav
Terrarian
To defeat all the bosses at once requires hard work with traps, events, terrain, and even NPC's! If you follow this guide thread you will be on the path to the best way to get the "Exterminator" acheivement. The first step is to make a big box, next fill it with traps. Now you need to be in Hard Mode to do all of this, you need turtle armor, turtle boots, shine potions, greater healing potions, And a dragon helmet and don't forget some cool vanity and dye. Now make a tunnel straight down to hell and get a lot of materials so you can make structures that can put you in an advantage. Tip: make the box and traps in hell and get the spawner for ALL the bosses. Make several boxes since The Wall Of Flesh comes from both ways and pulls you in front of it when you go behind it. The last step is get a lot of buffs and use pets. Clorophite armor can be used but will have a lower defense number.