Here is the full list of all 41 Siege Survival: Gloria Victis achievements.
Unlock Kimbra as a playable character.
Unlock Demetrius as a playable character.
Unlock all available playable characters.
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.
Craft a sword using the upgraded Armoury.
Prepare for using the trebuchet by scoring 4 points in scouting before a battle.
Build enough beds for all characters.
Galvik survives and returns to the Bastion.
Reach 50 points of the the Bastion strength.
During an enemy assault exceed their strength so much, they will flee from the battlefield.
Unlock Jacob as a playable character.
Unlock all the scavenge starting point during a single scenario.
Kill an enemy guard at night.
Complete trade with any merchant at night.
Manage a party of 4 characters at once.
Unlock Gerard as a playable character.
Survivalist unlocked scenario is now available for you to play
Survive a fight during the nighttime scavenge.
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.
Unlock Rena as a playable character.
Join any new character to your group.
Collect all piles inside the castle.
Explorer scenario is now available for you to play
Quick Start scenario is now available for you to play
Complete the Scavenger scenario.
Complete the Defender scenario.
Complete the Survivalist scenario.
Win all battles of the whole scenario.
Kill 3 enemy guards during a single night.
Unlock Mikel as a playable character.
Unlock Rose as a playable character.
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.
Use the trebuchet during a battle.
Craft a heavy armour using the upgraded Armoury.