half life chapters as dril tweets

cwowbaw:

black mesa inbound: 

anomalous materials:

unforseen consequences:

office complex: 

weve got hostiles:

power up: 

blast pit:

on a rail:

apprehension:

residue processing: 

questionable ethics: 

surface tension: 

forget about freeman: 

lambda core: 

xen:

gonarchs lair: 

interloper: 

nihilanth: