Crazy Dave will choose three random seed packets in the player's seed slots, each of which is different in every level and cannot be replaced or removed, but can be altered on most versions by closing the game and restarting it.

The player will also discover the Zombie Yeti upon playing Level 4-10 for a second time. The player will face increased difficulty and a more challenging gameplay than they have experienced when playing for the first time.

The player can use whatever plants previously obtained in each level. Once the player has finished Adventure Mode for the first time, he / she can opt to replay the Adventure mode. More mini-games (at least one, but a maximum of three) and Puzzle Mode levels are unlocked, and Survival Mode is unlocked.The Home Lawn Security achievement is obtained.The Silver Sunflower Trophy is obtained.

Once Adventure Mode has been beaten once:

At the end of Level 5-10, the player just gets another note from the zombies saying they give up and the Silver Sunflower Trophy at the first time.

The tenth level is a conveyor-belt level, and a seed packet that is important for the next area is obtained at the end of it.

A note from the zombies is obtained at the end of the ninth level.

The fifth level is a mini-game, and a seed packet is obtained at the end of it.

At the end of the fourth level, an item is obtained.

At every first, third, sixth and eighth level, a new zombie is encountered.

At the end of first through third and fifth through eighth levels, a new seed packet is obtained.When playing Adventure Mode for the first time: New Adventure Mode level button First time playing Adventure Mode During Level 3-2, the mini-games mode is unlocked, and Puzzle Mode is unlocked during Fog Level 4-6. Every fifth level, except for Level 5-5, is later unlocked as a mini-game or Puzzle Mode level. The tenth level of every stage is a conveyor-belt level. The fifth level in each area is a bonus level, which takes the form of a mini-game. In Adventure Mode, the player starts out with only a Peashooter.

Plants vs zombies adventures play