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