Here is the full list of all 16 Battle Ranch achievements.
Finish up to level 30 in Unlimited mode
Collect all the gold stars in the Boar Mania mode
Collect all the gold stars in the Catapult mode
Collect all the gold stars in the Defense mode
Collect all the gold stars in the Harvest mode
Collect all the gold stars in the Nightmare mode
Collect all the gold stars in the Special Games
Collect all the gold stars in the Extra Games
Collect all the gold stars in the Unpredictable Season
Collect all the gold stars in the Winter
Collect all the gold stars in the Fall
Collect $1.000.000
Harvest the 100.000 fruit
Collect all the plants in your Garden
Collect all the gold stars in the Summer
Collect all the gold stars in the Spring