1. Start a Game With A Large Map, and Brutal Difficulty.
2. Click on the Laptop to Download Objectives.
3. If there is An Artifact on your map, It shows up in the yellow optional objectives on the laptop.
(If Not See Step - 6)
4. Dont Open the Inner Tomb.
5. Takes anywhere from 1 minute to 20 minutes to search the ruins. Collect the Artifact (And/or Lorepages) and
6. Run back out to the Entrance, Put Any Collected On The Table, And Close the Hatch On The Jeep.
7. Repeat Steps 1-6.
It will give you an artifact you dont have, until you have All 24, Which Pops The Achievement.
Good Luck!
Video Guide:
*Written In Early Access, Update 1.0 - Artifacts Are Now Located In Chests, And Don't Float Or Glow*