Scientist John Pilgrim and his team have accidentally created a pathogen that is killing all living cells on Earth."

Riiiiight..."accidentally"

This game is good, basically you found a cure to cancer, but it turns out that cure is actually an aggressive disease that is killing everything.

I am quite surprised an angry mob doesn't kill you or burn down your lab.

The endings can be quite depressing. You die with your child, you commit suicide after your entire family dies, or you find a cure to the cure to cancer in which case only you and your child are the living survivors...(Yeah, you know what that means in order to reproduce humans?)

woowee i reall liked it even tho ending was really sad nice game! good job <3

Keep going if you fell down you have to keep going if the closest friend died then keep going and when you do all you can do you can help others that you love...:)

I do like the game, and how it only lets you play once. However being a coder, I realize that it obviously does this through tracking cookies to see that you've played so it won't let you play more than once. Deleting cookies allows you to replay the game. Have fun!

Wow...it really only lets you play only once. Bravo. While I do find this a bit frustrating as I do want to try out other possibilities, I suppose to have it like this does give more of an impact. Especially since it's called One Chance. Very good work on this game, I got SPOILER ALERT: The ending where the guy tries to kill John, goes to kill John's family and then himself and it really made me feel.