Tracker

The Tracker is an NPC vendor that will spawn once the following conditions have been met:


 * There is an empty house.
 * The Eye of Cthulhu has been defeated.

When threatened by enemies, he will defend himself with an iron broadsword.

Contracts
The Tracker hands out contracts to kill certain rare enemies. Contracts are separated into three groups, based on progression:
 * Tier 1 is available by default; this group encompasses enemies encountered in Pre-Hardmode.
 * Tier 2 is unlocked after defeating the Wall of Flesh; this group encompasses enemies between the beginning of Hardmode up to defeating the three Mechanical Bosses.
 * Tier 3 is the final tier, unlocked after all the previous contracts; this group has a single contract against Bone Lee.

The contracts in each tier can be completed in any order. After completing a specific contract, new items corresponding to the target enemy will be unlocked for purchase in the Tracker's shop. These items can be bought with Vanquisher Medals, which are obtained from killing said targets.

Names
The Tracker can have any of the following names: 
 * Aaron
 * Atlas
 * Brendan
 * Cliffton
 * Conrad
 * Cyris
 * Dalton
 * Daston
 * Garm
 * Gustav
 * Guts
 * Hunter
 * Kwan
 * Linus
 * Roy
 * Schneider

Interaction quotes

 * "Seen any interesting beasts lurking around lately? Minotaurs? Beholders? Gorgons?"
 * "Bear your scars with pride, as each one has a tale to tell... What do your scars say about you hero?"
 * "Many beasts have fallen to me and my blade, but new ones are always on the prowl. Keep your eyes peeled, kid."
 * "You'd be surprised how effective a single shoulder pad can be."

Trivia

 * A number of the contracts are references to various media:
 * "Arc of the Lost Raider" is a reference to the film .
 * The icon for "Ice Breaker" is a reference to from the  hoax.
 * "Not So Itsy Bitsy" refers to the nursery rhyme "".
 * "Drunken Sailor's Query" is a reference to the "".
 * "Gonna Need a Bigger Lamp", along with the contract icon, are references to the "Moth Lamp" meme.
 * "Destroy All Monsters" is named after the of the same name.
 * The name "Guts" is a reference to the main protagonist of the same name from the  manga series.