Here is the full list of all 41 Siege Survival: Gloria Victis achievements.
Win all battles of the whole scenario.
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.
Reach 75 points of the the Bastion strength.
Unlock Rena as a playable character.
Provide the soldiers with enough food that they get a boost
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.
Kill an enemy guard at night.
During an enemy assault exceed their strength so much, they will flee from the battlefield.
Craft a heavy armour using the upgraded Armoury.
Craft a sword using the upgraded Armoury.
Reach 50 points of the the Bastion strength.
Quick Start scenario is now available for you to play
Explorer scenario is now available for you to play
Finish the scenario without loosing any survivor.
Unlock all the scavenge starting point during a single scenario.
Survive a fight during the nighttime scavenge.
Unlock Rose as a playable character.
Manage a party of 4 characters at once.
Send out at least 2 characters to scout the enemy lines at night.
Unlock Jacob as a playable character.
Join any new character to your group.
Build enough beds for all characters.
Complete trade with any merchant at night.
Collect all piles inside the castle.
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 Kimbra 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