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