Here is the full list of all 15 Hunter's Legacy achievements.
Activate all teleporters
Shoot 300 arrows
Acquire all sword upgrades
Find all hideouts of Rampelkimpers
Make a Kobold drop its shield
Kill 200 enemies
Upgrade your wallet to its fullest
Finish the game
Collect a total of 2500 currency
Find all ores in the game
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