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