An in-depth look at how Uncharted 4's co-op Survival mode will work

It's all about strategy.

Uncharted 4‘s Survival mode was announced at the end of November and is essentially a survival wave-based mode that you can play solo or co-op.

We got some basic info last month, but during PSX this weekend, Naughty Dog's Vinit Agarwal expanded on the objective types and how the mode will work when playing solo, with friends having the option to drop in and out of the game mid-match.

Agarwal touched on different weapons' suitability for different waves and bosses, and the strategies you'll need to take them down.

If you're a fan of Uncharted multiplayer, the video is definitely worth a watch.

Survival mode will be available to download for free in mid-December.