Addon: Gero's Plants vs. Zombies

In the Add-on, zombies will spawn on the surface in different biomes. Their types will be effected by biomes, difficulty, brightness and world age.

For example, Modern Zombies will spawns at plains, powerful zombies like Brickhead Zombie will spawn in hard mode, All-star Zombies will spawn at night, Gargantuar will spawn after 5 Minecraft days.

Besides, the Weeds will also spawn on the surface, they will help you to protect youself.

Craft your plants:

Plants need puzzles, genes and suns to craft, you can buy these items from the Gene Editor and the Genetic Sequences Shop.

You can remove the shops in sneaking.

You can kill zombies to get the coins 

Puzzles can be crafted with seeds, papers and dyes.

In the end, craft your plants in the crafting table.

The Plants:

There are a lot of Seedpackets, they need time to cooldown after use.

You can use Energy Bean（Plant Food）to release their powerful skills. 

Craft a shovel to remove the plants.