Here is the full list of all 32 Mini Madness achievements.
Complete all trainings
Complete all championships
Collect all stars
Discover all secrets
Collect 30 stars
Discover 5 secrets
Activate the ball in the attic and play with it
Activate the holographic bridge over the wheelbarrow in the garage
Open the safe in the sitting room
Burn $10,000
In Challenge mode, burn the card bridge
Collect 3 coins during the jump
In championship mode, overtake your opponent an entire lap
In the Climbing minigame, get to the finish line in less than 2 minutes
In the Minigolf minigame, bring the ball to the hole in less than 3 minutes
In the Abracadabra minigame, collect 15 coins per minute
In the Billiard minigame, score at least 60 points in 1 minute
In championship mode, detonate a nitro bottle so that it hits your opponent when it's in the air
Activate the gravity core in the children's room
In challenge mode, smash the piggy bank
In challenge mode, collide with the helicopter in the corridor
Take control of the drone in the training room
In the basement, make an epic jump by doing an air flip through the rim on the bicycle handlebar
In challenge mode activate an alternative checkpoint above the kettle in the kitchen
In championship mode, do at least 30 air flips on the first route in the garage and be the first at the finish
In championship mode, make 3 epic jumps on the second route in the upstairs room and be the first at the finish
In championship mode, collect all 20 coins on the first route in the corridor and be the first at the finish
In championship mode, collect all 20 coins on the first lap on the first route in the bathroom
In championship mode, drive through the alternative gravity panel on the first route in the basement
Turn off the force field in the training room
Take a gift from the cyber chest located on the second route of the attic
In championship mode in the attic, blow up the monitor when the enemy vehicle is in range of the explosion