Here is the full list of all 73 Ryse: Son of Rome achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Fight On Each Multiplayer Arena Environment.
Achieve Rank 200 In Multiplayer.
Equip Your First Tier 6 Item In Multiplayer.
Achieve Rank 150 In Multiplayer.
Perform 30 Environmental Executions In Forbidden Forest.
Perform 30 Environmental Executions On Island.
Survive For 7 Minutes In Dockyard (Survival Mode).
Survive For 7 Minutes In Firestorm (Survival Mode).
Equip Your First Tier 5 Item In Multiplayer.
Achieve Rank 100 In Multiplayer.
Perform 1000 Executions In Multiplayer.
Unlock All The Rewards Of The Gods.
Survive For 7 Minutes In Courtyard (Survival Mode).
Complete 20 Multiplayer Campaigns.
Complete False Gods.
Equip Your First Rare Item In Multiplayer.
Equip Your First Tier 2 Item In Multiplayer.
Complete The Son Of Rome On Legendary Difficulty.
Complete The Wrath of Nemesis On Legendary Difficulty.
Complete Pax Romanum On Legendary Difficulty.
Get In Combat With All Executions And Upgrades Purchased.
Complete Edge Of The World Legendary Any Difficulty.
Complete The King On Legendary Difficulty.
Complete Trial By Fire On Legendary Difficulty.
Perform 50 Double Executions In Any Game Mode.
Complete S.P.Q.R. On Legendary Difficulty.
Complete The Beginning On Legendary Difficulty.
Complete The Son Of Rome On Any Difficulty.
Complete The Game on Any Difficulty.
Complete The Game On Soldier Difficulty.
Complete The Game On Centurion Difficulty.
Defeat Boudica.
Collect All The Scrolls.
Collect All The Chronicles.
Collect All The Vistas.
Complete The Wrath Of Nemesis On Any Difficulty.
Defeat Commodus.
Become The Righteous Hand Of Vengeance.
Complete Pax Romanum On Any Difficulty.
Find Out What Really Happened To Your Parents.
Complete Edge Of The World On Any Difficulty.
Defeat Glott.
Replay Any Single Player Level.
Complete The King On Any Difficulty.
Meet Boudica.
Use An Execution To Set Fire To An Enemy.
Defeat 25 Enemies In A Row Without Sustaining Damage.
Complete Beacon.
Complete Invictus.
Complete Barbarous.
Unlock The First Reward Of The Gods.
Play A Round Of Survival On Island.
Complete Trial By Fire On Any Difficulty.
Complete A Comic Book By Collecting 6 Chronicles In A Level.
Kill An Enemy By Perfectly Deflecting An Arrow.
Complete S.P.Q.R. On Any Difficulty.
Find Your Mother And Sister.
Play A Round Of Survival Mode.
Perform 100 Executions In Any Game Mode.
Perform A Co-op Execution.
Complete Your First Multiplayer Campaign.
Defeat 100 Enemies In Multiplayer.
Use A Trap To Kill An Enemy.
Revive Another Player 3 Times.
Defeat 10 Enemies In A Row Without Sustaining Any Damage.
Complete The Beginning On Any Difficulty.
Purchase And Use An Upgrade In Combat.
Collect One Chronicle.
Meet Nero.
Collect Your First Vista.
Perform Your First Environmental Execution.
Collect One Scroll.
Perform Your First Combat Execution.