I played a few rounds of this, and it's awful. This DLC drops players into the Mercenaries levels from the original game and pits them against each other in a barebones competitive game mode. Like Mercenaries, you start each game by picking a character with a fixed loadout. Getting defeated can cause you to drop your weapon, but there are other weapons to pick up that are haphazardly strewn around each level. You can actually engage in shootouts with other players in this game, which sounds cool on paper. Unfortunately, the base gameplay does NOT feel designed around this. Players do not react appropriately to being shot and weapons feel exceptionally weak, leading to duels that feel more like water gun fights. There are two different modes: one where you compete to kill zombies and another where you compete to kill players. Neither mode does anything special, and both lack a satisfying gameplay loop to keep you entertained.

But the worst part of this experience is that there are no progression or matchmaking systems in place. You can use points from the main game to purchase Versus mode characters, so you don't even need to play the damn mode to unlock everything in it. If you want to go online by yourself, you either have to join a lobby that some random person created elsewhere in the world or create your own lobby. This game is dead, dead, dead, and the players who do play are skilled. I found myself getting kicked from lobbies because of my poor performance, which isn't a particularly friendly way to welcome new players. Even when I did get to play, I was consistently underwhelmed by the experience. Matches drag on and you never feel a sense of progression.

Maybe if you have some friends to play with, this game mode could buy you a few hours of chuckling and guffawing at how sloppy it feels. Otherwise, just pass and play the base game.