Kill your first Scavenger enemy.
Complete the training level all the way through to the exit portal.
Collect the Shotgun.
Skip the training level by exiting through the very first portal.
Big spaceship lights
Enable power in the Process Control level.
My little friend says hello
Collect the Assault Rifle.
Firestarter, twisted firestarter
Collect the fire ammo blueprint.
A bigger, better, scalier rat.
Kill the Samurai that's wrecking the maintenance power conduits.
Ensign Livingstone, I presume
Kill an Exploder, a Baby Crawler, a Crawler, a Big Cousin, a Seeker and a Samurai.
The bunny o' war
Collect the Grenade Launcher.
Get off my ship!
Kill the Scavenger Queen.
It's time for science!
Reach the laboratories hub.
Collect the full set of N. Fortunate logs.
Kill 50 crawlers, of any description.
Collect the full set of F. Magnusson logs.
Collect the full set of B. Kowicz logs.
Dance little flames, dance
Spread fire to 5 enemies in under 20 seconds.