Darktide will have a playable psyker class

pcgamer.com:

Warhammer 40,000: Darktide is following in the footsteps of the Vermintide series, which are four-player co-op games where players choose from various thematically appropriate classes. While we saw an ogryn, a zealot, and two veterans in the release date trailer, a cover story in the latest issue of Edge Magazine confirms a psyker will be another option.

In the 40K universe, psykers are able to reach into the parallel universe called the warp with their minds and draw on its power to essentially work magic. It's risky, because the warp is where Chaos comes from: a sentient, malevolent force that manifests as daemons. The Inquisition hunts rogue psykers before they cause too much damage, and recruits the strongest of them to join the ranks of the Sanctioned Psykers.

As sometimes PCG writer Alex Wiltshire writes in Edge #372, «The Psyker is an unstable magic user who, if they overuse their powers to pop heads, will succumb to the perils of the Warp and explode, similarly to the way Sienna, Vermintide's wizard, does.» 

Darktide's psyker can also use the power of the warp to protect against incoming ranged attacks, though it seems every class has a similar shield, with the veteran protected by armor, the zealot by the power of faith, and the ogryn by sheer thickness. All of the shields encourage grouping up by recharging faster if you're close to other players.

While the classes in the Vermintide games are five distinct existing characters, in Darktide players get to personalize them, personalizing their own loadout and face. «Fatshark hasn't designed a character creator for its previous games,» Alex writes, «but the system incorporated here ably allows you to construct the scarred and mutilated grimdark hero you always