The Ancient Relics Story Pack Add-on for Stellaris has 9 achievements.
Have 100 Minor Artifacts
Find a Relic
In one game, find 5 Relics from Ancient Relics Story Pack
Successfully investigate an archaeological site
Complete the Baol Precursor chain
Complete the Zroni Precursor chain
Capture the Galatron from another empire
Study Minor Artifacts and discover a random technology
Use the active effect of a Relic