Steam Ages - Day 4 is the fourth level of Steam Ages in the Chinese version of Plants vs. Zombies 2. When this level is finished for the first time, the player will receive the Steam Ages lawn mowers.
In Normal mode, the player has to beat the zombies at Level 1.
This level can be very difficult for those without the proper plants. Steam Sewers are placed in the first column, making it difficult to keep your plants alive. The player should use Flat-shroom to block off the sewers for as long as possible.
In hard mode, the player has to defeat leveled-up zombies.
With the added threat of steam sewers and the high-leveled zombies, this level can be very difficult. The player should only play this level when they have high-leveled plants.