Here is the full list of all 15 Hunter's Legacy achievements.
Find all hideouts of Rampelkimpers
Acquire all sword upgrades
Collect a total of 2500 currency
Make a Kobold drop its shield
Shoot 300 arrows
Kill 200 enemies
Upgrade your wallet to its fullest
Finish the game
Find all ores in the game
Activate all teleporters
Talk to all inhabitants of Iripur
Acquire all bow upgrades
Acquire all health upgrades
Achieve a 100% game completion
Beat the game without a single upgrade