Here is the full list of all 41 Siege Survival: Gloria Victis achievements.
Complete the Defender scenario.
Complete the Survivalist scenario.
Reach 75 points of the the Bastion strength.
Unlock all available playable characters.
Complete the Scavenger scenario.
Unlock Rose as a playable character.
Unlock Mikel as a playable character.
Win all battles of the whole scenario.
Find and collect all the treasure chests available in 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.
Craft a heavy armour using the upgraded Armoury.
Craft a sword using the upgraded Armoury.
Galvik survives and returns to the Bastion.
Provide the soldiers with enough food that they get a boost
Kill 3 enemy guards during a single night.
Use the trebuchet during a battle.
Complete trade with any merchant at night.
Prepare for using the trebuchet by scoring 4 points in scouting before a battle.
Reach 50 points of the the Bastion strength.
Kill an enemy guard at night.
Build enough beds for all characters.
Unlock Jacob as a playable character.
Unlock all the scavenge starting point during a single scenario.
Unlock Gerard as a playable character.
Survivalist unlocked scenario is now available for you to play
During an enemy assault exceed their strength so much, they will flee from the battlefield.
Unlock Kimbra as a playable character.
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.
Manage a party of 4 characters at once.
Unlock Demetrius as a playable character.
Survive a fight during the nighttime scavenge.
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