The Echoing Void Add-on for Minecraft Dungeons has 9 achievements worth 240 gamerscore.
Travel through the End Portal to the End Wilds.
Enter the Stronghold Vault.
Defeat the Vengeful Heart of Ender.
Unlock all mission item drops in the base game and DLCs.
Reach the top of the Broken Citadel without ever getting hit by a Shulker.
Defeat a total of 1,000 Enderlings (Watchling, Blastling, Snareling) with an Obsidian Claymore.
Survive being afflicted by Voided x999.
Using the Elytra, dive attack 12 enemies at once.
After consuming a Burning Brew, defeat a Mob using a weapon with the Fire Aspect enchantment.