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.
Manage a party of 4 characters at once.
Unlock Demetrius as a playable character.
Use the trebuchet during a battle.
Reach 75 points of the the Bastion strength.
During an enemy assault exceed their strength so much, they will flee from the battlefield.
Unlock all the scavenge starting point during a single scenario.
Craft a heavy armour using the upgraded Armoury.
Craft a sword using the upgraded Armoury.
Reach 50 points of the the Bastion strength.
Complete trade with any merchant at night.
Kill 3 enemy guards during a single night.
Join any new character to your group.
Unlock Jacob as a playable character.
Send out at least 2 characters to scout the enemy lines at night.
Defender unlocked scenario is now available for you to play
Scavenger unlocked scenario is now available for you to play
Survive the first 7 days of the invasion.
Survive a fight during the nighttime scavenge.
Kill an enemy guard at night.
Collect all piles inside the castle.
Build enough beds for all characters.
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 Gerard as a playable character.
Unlock Mikel as a playable character.
Unlock Kimbra as a playable character.
Unlock Rose as a playable character.
Provide the soldiers with enough food that they get a boost
Find and collect all the treasure chests available in the whole scenario.
Survivalist unlocked scenario is now available for you to play