Steins;Gate and Steins;Gate 0 Episode 23 Divergence Point
In here you can observe what makes the difference as the Steins;Gate Okabe had gotten a message from a future Okabe, which is the one in Steins;Gate 0. He had to fail in order to inform the Okabe in Steins;Gate how to save Makise Kurisu.
MAG.MOE - The MAG, The MOE.