Here is the full list of unlockable achievements in Deadliest Warrior: Legends for the Xbox 360.
A Pox of the Small Variety (5) – Win a ranked online duel against a developer playing as Cortes or someone with this achievement.
Dead and Broken (10) – Break your opponent’s arm and leg by grappling before final striking them in a ranked duel.
Denied! (10) – Parry your opponent three times in a row without being hit in a single ranked duel.
If anyone Khan, Genghis Khan! (35) – Beat arcade mode with Genghis Khan using only the dead fish on Deadliest Difficulty.
Legendary Arsenal (20) – Unlock all weapon and armor for each of the Legendary Warriors.
Legendary General (15) – Activate all three General Abilities during a single game of Generals.
Legendary Warrior (10) – Win 10 online ranked duels.
Marksman (10) – Get three consecutive headshots using any long range weapon in a single ranked duel.
Six Degrees of Separation (35) – Severed every limb from your opponent during a slice mode duel without using a final strike.
Slash Mode (40) – Kill 50 enemies in a row in Survival Slice Challenge as the primary player.
These Dice are Loaded! (5) – Lose three consecutive battles at even odds or better during a game of Generals.
When Push Comes to Shove (5) – As the primary player, After being pushed knock an opponent out of the ring.