Gameplay in Atomicrops is divided into levels of difficulty called Years.
There are currently 10 Years in Atomicrops, and each consecutive year is unlocked by beating the prior Year, with Year 1 being every player's first experience. The difficulty increases with each Year, with features such as faster and more numerous Enemies, higher Cashew requirements, and lower max Health at start. Before each run, the player can select which Year they would like to play by interacting with a sundial at the Farmhouse.
Some Years may unlock additional features the first time they are completed:
|Year||Features||Reward on completion|
|Year 1||Default Year on start.||Spouse: Waterchris |
Achievement: Year One Lotus
|Year 2||Slugs will fire bullets and chase the player if no Crops are planted.||Playable Character: Robusta|
|Year 3||Weed Monsters will start spawning on the Farm.
Elite Enemies will begin appearing.
|New Event: Surplus Mode|
|Year 4||Playable Character: Thyme|
|Year 5||Festival Shop: Dicey's Casino |
Achievement: Demi-Decade Orchid
|Year 10||Achievement: Corpse Flower|