Make your way to the camp
Find the main town
Find your first enemy
Find the graveyard
Go inside the tomb
Go inside the testing facility
Discover the valleys truth
Achieve The "Extinction" Ending
Find Ben's Remains
Achieve The "All Hope Gone" Ending
Discover the secret of the meteorites
Unlock the church doors
Explore the whole lab
Collect the meteorites shard
Wait for the rain
Find Sarah's remains
Find Zac's remains
Achieve The "Two Remains" Ending