A Rusty's Retirement farm with two Biofuel converters, two Biofuel Bots, two Harvest Bots, and two Water Bots.
Screenshot by Pro Game Guides

How to get Spare Parts fast in Rusty’s Retirement

Get rich fast in retirement.

Rusty uses Spare Parts to purchase everything from crops to more farmland in Rusty's Retirement. I'll show you how to gather Spare Parts quickly so you can expand your next Rusty's Retirement farm.

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How to make Spare Parts quickly in Rusty's Retirement

When you start a new farm in Rusty's Retirement, you'll have a house, a Biofuel Converter, a well, and one 4x4 crop patch. You will also have 400 Spare Parts and 8 Biofuel. Instead of investing this money directly into crops, I recommend purchasing a Water Bot and a Harvest Bot from the shop. They are located in the "buildings" tab, which has a small house icon.

The location of the Water Bot and Harvest Bot items in the Rusty's Retirement shop.
Image by Pro Game Guides

They will help Rusty harvest crops much faster and free up space for him to build and move crops to the Biofuel Converter. Start by building the Water Bot, then set up the Harvest Bot and fill the field with wheat seeds.

Constructing a Water Bot and a Harvest Bot next to a wheat field in Rusty's Retirement.
Screenshot by Pro Game Guides

The wheat will grow and be harvested quickly thanks to the bots. With the money, plant two rows of wheat, one row of beets, and one row of cabbage.

Growing wheat, cabbage, and beets in Rusty's Retirement.
Image by Pro Game Guides

Related: AFK Journey Beginner Guide

While these grow, take a moment to look at the locked crops in the crop shop. By hovering over them, you can see the requirements for unlocking them. Crops like beets aren't as good at generating Scrap Parts quickly, but you'll need to grow a certain amount to unlock crops that are. Grow enough to unlock the crops with their requirements and you can pretty much forget about them after that.

Looking at the unlock requirements for a crop in Rusty's Retirement.
Image by Pro Game Guides

At this point, you'll also want to change the order of Rusty's priority tasks. I made building his first followed by moving, then biofuel, then harvest and water since the bots take care of those. This should help Rusty complete the tasks only he can do before helping with the tasks the bots manage.

Rusty's task priorities in Rusty's Retirement.
Screenshot by Pro Game Guides

As you continue through the game, making the most money will require unlocking new crops, adding more bots, and beginning to invite new friends. I started by adding a Biofuel Bot so that I could take advantage of the Biofuel to Spare Parts conversion. I then added a second Water Bot, a second Harvest Bot, and quickly made enough to build Haiku's house for an extra set of hands. I also built another Biofuel Converter to get lots of Biofuel for converting to Spare Parts.

A Rusty's Retirement farm with two Biofuel converters, two Biofuel Bots, two Harvest Bots, and two Water Bots.
Screenshot by Pro Game Guides

Converting Biofuel to Spare Parts

As crops are harvested, Rusty and his pals will place three different varieties of crops onto one Biofuel Converter. The converter will begin creating Biofuel as soon as all three are placed. After about 20 seconds, the crops will disappear and Biofuel will be created.

Using the Biofuel Converter in Rusty's Retirement.
Image by Pro Game Guides

Biofuel is necessary for fueling new robots and buildings, but it can also be converted into Spare Parts! There is a small "convert" button in the shop for exchanging Biofuel for Spare Parts.

Converting Biofuel to Spare Parts in Rusty's Retirement.
Image by Pro Game Guides

This tab can be used to convert your Biofuel into extra Spare Parts. One Biofuel is worth 10 Spare Parts. As an example, in the image below I have 230 Biofuel and 856 Spare Parts.

Choosing to convert 100 Biofuel in Rusty's Retirement.
Screenshot by Pro Game Guides

After selecting 100 Biofuel in the converter and completing the conversion, my amount of Spare Parts increases from 856 to 1,856! While you'll want to save Biofuel later on to unlock the most expensive houses, it's a perfect way to get money at the start of your farm.

Converting 100 Biofuel to 1,000 Spare Parts in Rusty's Retirement.
Screenshot by Pro Game Guides

Related: AFK Journey Tier List, Reroll Guide, & Best Teams

If you want to use this method the most, the following crops are perfect for converting into Biofuel for your farm. The "Biofuel Conversion Value" in the table shows how much Biofuel a plant will turn into in the Biofuel Converter. Add the Biofuel Conversion Value of all three crops on a Biofuel Converter to see how much Biofuel you will get.

CropSeed PriceBiofuel Conversion
Value
Number of CyclesTotal Biofuel Conversion
(One Plant, All Cycles)
Cabbage2 Spare Parts2 Biofuel36 Biofuel
Carrot3 Spare Parts3 Biofuel412 Biofuel
Corn5 Spare Parts4 Biofuel520 Biofuel
Onion7 Spare Parts5 Biofuel630 Biofuel
Turnip9 Spare Parts6 Biofuel848 Biofuel
Pinto Beans12 Spare Parts7 Biofuel963 Biofuel
Pumpkin19 Spare Parts8 Biofuel1080 Biofuel
Red Chili16 Spare Parts9 Biofuel1199 Biofuel
Red Onion18 Spare Parts10 Biofuel11110 Biofuel
Oats24 Spare Parts11 Biofuel12132 Biofuel
Yellow Bell Pepper28 Spare Parts12 Biofuel14168 Biofuel
Artichoke55 Spare Parts13 Biofuel15195 Biofuel
Sweet Potato50 Spare Parts14 Biofuel15210 Biofuel
Red Grapes70 Spare Parts15 Biofuel16240 Biofuel
Kale75 Spare Parts18 Biofuel18324 Biofuel

Best crops for Spare Parts in Rusty's Retirement

While some crops in the game are better for Biofuel, others are perfect for grinding Spare Parts. This list will show all the crops in the game that give the most profit with their initial cost in mind. As you expand Rusty's farm, you'll stop growing the crops at the top of the list and begin developing those closer to the bottom.

CropSeed PriceSpare Parts Given
(per cycle)
Number of CyclesTotal Profit
(One Plant, All Cycles)
Wheat0 Spare Parts3 Spare Parts13 Spare Parts
Leek2 Spare Parts4 Spare Parts414 Spare Parts
Celery3 Spare Parts5 Spare Parts522 Spare Parts
Lettuce5 Spare Parts5 Spare Parts625 Spare Parts
Cauliflower7 Spare Parts6 Spare Parts735 Spare Parts
Tomato9 Spare Parts8 Spare Parts855 Spare Parts
Pinto Bean12 Spare Parts9 Spare Parts969 Spare Parts
Broccoli16 Spare Parts11 Spare Parts1094 Spare Parts
Red Chili16 Spare Parts12 Spare Parts11116 Spare Parts
Red Onion18 Spare Parts13 Spare Parts11125 Spare Parts
Garlic27 Spare Parts15 Spare Parts13168 Spare Parts
Green Bell Pepper35 Spare Parts17 Spare Parts14203 Spare Parts
Cucumber35 Spare Parts18 Spare Parts15235 Spare Parts
Black Beans45 Spare Parts19 Spare Parts16259 Spare Parts
Green Grapes60 Spare Parts21 Spare Parts17297 Spare Parts
Kale75 Spare Parts24 Spare Parts18357 Spare Parts

Looking for a new idle game to pick up? Check out our Pixel Heroes tier list here on Pro Game Guides.


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Author
Krista McCay
Contract Writer - Pro Gamer Guides. I work on Minecraft articles, particularly updating articles as the game changes and grows. I do play a lot of Minecraft, but I also enjoy games like Overwatch 2, Hades, and Splatoon 3 .

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How to get Spare Parts fast in Rusty’s Retirement

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