Delivery From The Pain - Big brother's legend / 末日方舟-老大哥传奇 (AppID: 1104750)

This DLC introduces new story content, played through a different character's eyes,  and introduces a new companion, in addition to a new area and new monsters. Due to the relative difficulty of the DLC and possibility of spoilers, we strongly advise against playing it before completing Chapter 2 of the base game.

Features:
Big Brother, antagonist of the base game, is now a playable character.

1.New Story:

the story between Big Brother & Moira explained lots of confuses you may have while playing base game.

2.New Pet:

a dog named hamburger will join your team & can be more energetic in toxic areas.

3.New game system:

creative feeding & training system will offer you a brand-new survival adventure experience in the zombie’s world.

4.New Map:

a new map of lumberyard will be added to offer you base survival food sources.

5.New Character:

a man who worked for Big Brother in Big Brother previous gang will appear in new DLC, you will know how can he survive in doomsday and you can trade with him too.

6.New Mode:

you can get unlimited survival supply pack under assist mode when you want to have a quick understanding about the new story, if you are an experienced survival game player, you can try the survival mode with significant difficulty to challenge yourself.

7.New Cooking System:

you can send gifts to Moira to get new surprise from her.

Myriad changes, updates, and fixes that accommodate new strategies and playing styles.