Here is the full list of all 29 Renegade Grounds: Episode 1 achievements.
Survive the first 5 battles in the arena.
Clear the Ceteri Temple.
Find all chests in a single playthrough.
Beat the final boss of story mode without Agela or Ingus being K.Oed.
Find a secret room in the Ceteri Temple.
Clear the city outskirts.
Clear the Ashen Crossing.
Clear the Ashen District.
Find a secret room in the Ashen District.
Clear the infernal escape.
Clear the infernal grounds.
Find a secret room in the Infernal Grounds.
Clear the abandoned mine.
Find a secret room in the Abandoned Mine.
Clear the Subterranean Cave.
Find a secret room in the city tunnels.
Clear the city tunnels.
Clear the underground slums.
Find a secret room in the underground slums.
Clear the slums streets.
Clear the slums entry.
Beat the game on Brazen difficulty.
Defeat every enemy in every stage in a single playthrough.
Survive the first 10 battles in the arena.
Survive the first 15 battles in the arena.
Survive all 20 battles in the arena.
Defeated the Scorching Golem.
Defeated the Glacial Golem.
Defeated the Obsidian Golem.