© 2026
Achievements
FossilfuelSync your progress to see which achievements you've unlocked.
Log in to track
Welcome to Sierra
Start your day at the Sierra Research Institute.
93.3% global
Making Friends
Get to know some of the scientist.
5.3% global
Build your headlamp
Land of the blind no more!
68.7% global
First Encounter
Meet Utahraptor.
89.1% global
Hidden Achievement
HiddenKeep playing to discover this achievement
24.1% global
Titanoboa
Defeat Titanoboa.
15.8% global
Hold on to your butts
Restore the sub-level power.
9.1% global
Get to administration
You have escaped the lower sub-level of Sierra.
18.3% global
Judo-Chop!
Snap a neck.
1.5% global
Allosaurus
Defeat an Allosaurus.
6.6% global
Game over man!
Make a last stand with the other survivors.
3.7% global
Hidden Achievement
HiddenKeep playing to discover this achievement
6.6% global
Openworld
Get to the surface of the Great Sitkin Island.
8.5% global
Laboratory
Make it to the Sierra laboratory.
12.1% global
To Serve Man
Unleash bugs onto the soldiers.
2.6% global
Hidden Achievement
HiddenKeep playing to discover this achievement
45.1% global
Event Horizon
Find the gravity grenade, "Black Hole" gun.
2.1% global
Freak'in laser beams
Get the Focus Beam.
3.1% global
Playing with Power
Enter the Power Plant.
11.6% global
3.6 Roentgen
Overload the Nuclear Reactor.
5.1% global
AZ-5
Stabilize the Nuclear Reactor.
7.2% global
Hidden Achievement
HiddenKeep playing to discover this achievement
4.7% global
Hidden Achievement
HiddenKeep playing to discover this achievement
4.9% global
Hidden Achievement
HiddenKeep playing to discover this achievement
5.8% global
Hidden Achievement
HiddenKeep playing to discover this achievement
5.7% global
Hardcore
Beat the game on the hardest setting.
1.7% global
Super Hardcore
Beat the game on hard, and get an S rank.
0.9% global
Eight Leg Freak
Defeat the Queen bug.
6.7% global
