Episode 4 features the 'Zombie Game' where two contestants start as zombies and try to infect humans by touching them, while humans try to score points by touching other humans and avoid becoming zombies themselves. Players have antidotes to cure infection if used in time, and the game is played over three 30-minute rounds with strategic touching and trading of antidotes involved.

Key strategic interactions involve contestants like Bedallia, Afy, Ken, Charlotte, and Ami. For example, Bedallia and Afy discuss trading a black box, and Ken holds important white blocks that others want to trade for. Ami tries to leverage alliances, including with Ken and Allison, to gain advantages such as the Token of Life.

The black and white blocks are game elements that players trade and strategize over. Ken starts with two white blocks and the black block, making him a central figure in trades. The white blocks are highly sought after, and players like Ami and Bedallia negotiate trades involving these blocks to improve their standing in the game.

In the Zombie Game, humans become zombies if touched by a zombie unless they use an antidote within 10 minutes. Players must touch someone each round or become zombies automatically. The zombies win if they convert all humans and select a Death Match candidate; otherwise, the human with the fewest points becomes the Death Match candidate. This mechanic creates tension between scoring points and avoiding infection.

The Token of Life is a reward for the zombies if they win by turning all humans into zombies and selecting a Death Match candidate. It is also a strategic target for players allied with strong contestants like Ken, as controlling or receiving the Token of Life can be crucial for survival and winning the game.