Here is the full list of all 41 Siege Survival: Gloria Victis achievements.
Unlock Demetrius as a playable character.
Unlock Jacob 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.
Galvik survives and returns to the Bastion.
Use the trebuchet during a battle.
Prepare for using the trebuchet by scoring 4 points in scouting before a battle.
Collect all piles inside the castle.
Complete trade with any merchant at night.
Unlock all the scavenge starting point during a single scenario.
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.
Kill 3 enemy guards during a single 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.
Reach 50 points of the the Bastion strength.
Craft a heavy armour using the upgraded Armoury.
Craft a sword using the upgraded Armoury.
Survive a fight during the nighttime scavenge.
Kill an enemy guard at night.
Manage a party of 4 characters at once.
Survivalist unlocked scenario is now available for you to play
Unlock Gerard as a playable character.
Unlock Rena as a playable character.
Join any new character to your group.
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
Complete the Scavenger scenario.
Complete the Defender scenario.
Complete the Survivalist scenario.
Win all battles of the whole scenario.
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
Reach 75 points of the the Bastion strength.
Find and collect all the treasure chests available in the whole scenario.