OVA: Episode 23(β) Open the Missing Link

"Open the Missing Link" (境界面上のミッシングリンク,) is an alternate version of Episode 23 of the Steins;Gate animation adaptation released on December 2, 2015. It serves as a prequel episode of the to be aired anime adaptation of Steins;Gate 0.

Synopsis
The main difference between this and the original episode 23 is that this Okabe does not receive the Movie Mail from himself. HE will go on to eventually create Operation Skuld and the Movie Mail itself, helping S;G Okabe thwart world line convergence and successfully avert both Kurisu's death and WWIII in order to enter the Steins;Gate world line of 1.048596% divergence.