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