Here is the full list of all 55 Rusty's Retirement achievements. It takes around 120-150 hours to unlock all of the achievements on Windows.
Harvest 250,000 crops (across all farms)
Unlock the Desert Oasis farm
Earn 10 MILLION spare parts across all farms
Unlock the Blossom Forest farm
Water 1 MILLION crops (across all farms)
Unlock all berries
Place down ten pigs on one farm
Build on every available tile
Play the game for 48 hour (across all farms)
Produce 1 MILLION biofuel across all farms
Spin the Cog a thousand times
Unlock the Sandy Desert farm
Build 666 crop tiles on a single farm
Place down ten cows on one farm
Unlock all crops
Play the game for 24 hour (across all farms)
Place 10 Bulb Hives on a single farm
Max upgrade a Berry Bot
Grow a Giant Pumpkin
Earn 1 MILLION spare parts across all farms
Grow a Giant Cucumber
Collect 1,000 animal waste
Build 10 Biofuel Converters on a single farm
Max upgrade a Fertilizer Bot
Produce 100,000 biofuel across all farms
Max upgrade a Waste Bot
Place 100 decorations on a single farm
Place 25 decorations on a single farm
Deploy one of each robot on a single farm
Place at least one decoration
Max upgrade a Feeder Bot
Build Pinion's House
Build Forbic's House
Build Sonnet's Shop
Unlock the Flower Swamp farm
Build Splunk's House
Earn 250,000 spare parts across all farms
Unlock 25 crops
Build Slate's Barn
Max upgrade a Harvest Bot
Produce 25,000 biofuel across all farms
Grow a Giant Tomato
Max upgrade a Biofuel Bot
Earn 50,000 spare parts across all farms
Produce 5,000 biofuel across all farms
Max upgrade a Water Bot
Unlock 10 crops
Build Echo's Workshop
Earn 15,000 spare parts across all farms
Move a building at least once
Produce 1,000 biofuel across all farms
Build Haiku's House
Play the game for 1 hour
Unlock a new crop
Spin the cog once