 It is also revealed that , at the Black Mesa Research Facility , Frohman causes the resonance cascade that allows for alien forces to invade in Half @-@ Life by accidentally delivering a wedge of cheese , instead of the intended test sample , to the test chamber where the cascade <unk> . Half @-@ Life : Decay , however , indicates that Dr. Gina Cross is responsible for this task . Livingston admitted he did not play Decay , and thus was not aware of its storyline . He also stated that the comic takes place in the PC version of the Half @-@ life continuity , and since Half @-@ Life : Decay was never published for the PC , it does not affect the comic . 
