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