As the name suggests, Arcade Mode in Free Update 4 transforms the game's single-player campaign into a competitive, fast-paced time attack in which you aim to get the highest score possible.
You'll have access to all weapons, Runes and equipment upgrades at the start of each run. It'll be your job to come up with the optimal equipment combination to get through each stage as fast as possible while grabbing multipliers along the way and absorbing as little damage as possible.
It's a clever way to recycle the game's campaign that makes it feel fresh.
The update also brings classic Doom modules to SnapMap, Doom's level creation tool. To help jump-start things, id Software built a handful of classic maps for players to try out. Along those same lines, it's also now easier to recommend and review maps you've played.
It doesn't end there as the update introduces two new multiplayer maps as well.
In Possession, a team of marines are matched up against several player-controlled Prowler demons. Each marine that is killed respawns as a Prowler, putting additional pressure on the remaining marines.
Bloodrush, meanwhile, tasks players with maintaining their Bloodrush meter used to respawn by getting kills and assists. The meter drops significantly when you are killed and depletes over time until there's just one player remaining.
Full details on the update can be found over on Bethesda's website.