Steins;Gate

-Decide The Fate Of All Mankind-
CAN YOU CHANGE THE COURSE OF FATE?
AND SAVE THE ONES CLOSEST TO YOU?

Steins;Gate follows a rag-tag band of tech-savvy young students who discover the means of changing the past via mail, using a modified microwave. Their experiments into how far they can go with their discovery begin to spiral out of control as they become entangled in a conspiracy surrounding SERN, the organisation behind the Large Hadron Collider, and John Titor who claims to be from a dystopian future.

[From Steam]