Full list of all 29 Next Up Hero achievements worth 1,000 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox One.
Participated in a completed, Long Length Venture
Controlled a Follower while Spectating
Chose to Extend a Venture
Killed 3 Enemies with 1 Prestige Paladrin Shield Throw
Defeated 100 Buckles
Completed 5 straight levels, without dying, on a single playthrough
Successfully completed a Mayhem Level
Raised 15 Symposer Echoes in a single level
Summoned 8 using Ancients
Raised up 15 Echoes in a single level
Raised 10 of the same House Echoes in a single level
Chose to Kill a Boss
Completed a Venture with a 'AA' Rank
Invested enough Prestige to trigger a random Rare Enemy
Completed a Venture with a 'A' Rank
Successfully completed a Single Enemy Encounter
Successfully completed a Time Limit Trial Level
Summoned 4 Ancients on a single level
Had your Hero Die
Complete a Venture with a 'S' Rank
Unlock 35 Abilities
Unlock 9 Prestige Characters
Participate in a completed, Epic Length Venture
Successfully navigate a Darkness Level
Defeat 100 Dark Heroes
Participate in a Venture which gets completed with at least 500 Levels
Raised up the Echo of a Registered Streamer
Get killed by every unique enemy in the game
Completed a Venture with a 'AAA' Rank