Here is the full list of all 41 Siege Survival: Gloria Victis achievements.
Win all battles of the whole scenario.
Finish the scenario without loosing any survivor.
Complete the main storyline in one of the following scenarios: Story, Quick start, or Explorer.
Keep the defence so firm, the relief forces completely smash the enemy.
Galvik survives and returns to the Bastion.
Prepare for using the trebuchet by scoring 4 points in scouting before a battle.
Use the trebuchet during a battle.
Unlock all the scavenge starting point during a single scenario.
Reach 75 points of the the Bastion strength.
Unlock Jacob as a playable character.
Send out at least 2 characters to scout the enemy lines at night.
Provide the soldiers with enough food that they get a boost
Scavenger unlocked scenario is now available for you to play
Defender unlocked scenario is now available for you to play
Survive the first 7 days of the invasion.
Manage a party of 4 characters at once.
Unlock Demetrius as a playable character.
Unlock Gerard as a playable character.
Survivalist unlocked scenario is now available for you to play
Join any new character to your group.
During an enemy assault exceed their strength so much, they will flee from the battlefield.
Reach 50 points of the the Bastion strength.
Complete trade with any merchant at night.
Craft a sword using the upgraded Armoury.
Craft a heavy armour using the upgraded Armoury.
Survive a fight during the nighttime scavenge.
Kill 3 enemy guards during a single night.
Kill an enemy guard at night.
Build enough beds for all characters.
Collect all piles inside the castle.
Quick Start scenario is now available for you to play
Explorer scenario is now available for you to play
Unlock Rena as a playable character.
Complete the Scavenger scenario.
Complete the Defender scenario.
Complete the Survivalist scenario.
Unlock all available playable characters.
Unlock Mikel as a playable character.
Unlock Kimbra as a playable character.
Unlock Rose as a playable character.
Find and collect all the treasure chests available in the whole scenario.