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