While the upcoming open beta for Dragon Ball FighterZ starts on January 14, those who pre-ordered will be able to play the game a day early.
For those players in the EU who have pre-ordered the game, Bandai Namco Europe recently sent out a reminder on Twitter for them to redeem their codes, so that they can gain early access.
— Bandai Namco UK (@BandaiNamcoUK) January 8, 2018
Players who pre-ordered should go to this site. Here, they can enter their details, as well as the retailer code that should have come with their pre-order. Once this is done, they then need to link their PSN or Xbox Live accounts, again with their retailer code. This should allow them redeem their early access into the beta.
Take note that this is for European players only. Players in North America who pre-ordered the game digitally can simply download the client by searching for “Dragon Ball FighterZ Open Beta Early Access” on either the PlayStation Network or Xbox Live.
Source: Bandai Namco UK