A bad decision to make

Portal1, 1950, Portal2, 2000
Aliens invade aperture laboratories
They are from Aperture Multiverse Earth 1xx
The technology they purpose has increased the % of any test completion under one-day time
They found the Cake in the Archive
The cake is good in smell and
Eventually, they make a receipt for the cake
They will make more copies of that cake, but not the original receipt
After digestion, there are some side effects of the new cake receipt
It is just one that needs an introduction
The butthole of these aliens fart some type of gas
This gas is not harmful to aliens but is harmful to some other species in Multiverse including Cave Johnsons Earth-001
After some political investigation from those Cave Johnsons who are immune to the gas
They found who has those side effects
They found what are the effects on those who are not immune
They die, eventually from suffocation. Cave Johnson said "Tragic. But Informative"
Caves from Earth 001 to Earth 050 are busy making this normal byproduct by assigning new tests, cakes, and surprises to all who want to join in this business to collect more and more gas from testers
They introduce CO-OP
Cave, Earth-001 sells 1 gallon of gas to the Army of America
The army is surprised at how well this new weapon is
Then the army of America buys a tone of shower curtains
They will get more from this gas as a gift of great business with Cave Earth-001
This gas has no perfume, no color, no name
The name is easy because on the battlefield the use of this gas is like a toxin that finishes the neurons of the subject, then the subject dies
"D34dly N3ur0 T0x1n3" as deadly-neuro-toxin
Then the gas is a fart from the ass of the subjects. Easier is if the color matches this, so it will be green "as a tree in summer is"
"I think as head of the CEO the perfume is not important, but if someone is immune then try it is a mix of my fruit salad, as my parents made it for me. It's a pleasure. Not the dead. The perfume."
I [ So glad you made it... You made it... You ]