Here is the full list of all 61 Toasterball achievements.
Play 10 games
Play 100 games
Play 500 games
Score 10 goals
Score 100 goals
Score 500 goals
Destroy 25 toasters
Destroy 75 toasters
Destroy 250 toasters
Burn 100 toasts
Burn 250 toasts
Burn 500 toasts
Destroy 25 toasts
Destroy 100 toasts
Destroy 200 toasts
Pick up 500 toasts
Pick up 1000 toasts
Pick up 2000 toasts
Unlock all variants
Make a round last more than 2 minutes
Score with a turboflip
Achieve a 5-0 match
Lose 5-0 to an AI team
Score 100 goals with the Burners
Score 100 goals with the Defrosters
Do 3 full rotations in the air
Lose a teammate during a round and score against the whole opposing team
Read all credits
View all profiles in the athlete menu
Mash the "Shuffle" button in the roles menu
Play at least one game with each toaster
Win 50 matches with Markus
Win 50 matches with Frank
Win 50 matches with Smog
Win 50 matches with Olivia
Win 50 matches with Yuki
Win 50 matches with Sonny
Win 50 matches with Leni
Win 50 matches with Edward
Win 50 matches with Johnny
Win 50 matches with Kasia
Win 50 matches with Andrea
Win 50 matches with Felix
Win 50 matches with Jack
Win 50 matches with Anna
Make a custom game with a life threatening variant, 1 HP for toasters and doors and 1 point to win
Make a custom game with all the life threatening variants
Make a custom game with all fire variants
Make a custom game with all electrical variants
Play a custom match with rules to the max (99 HP, 99 points)
Play a custom match with these options: Toasterball Arena, "Button doors" variant, 5 points to win, 2 HP toasters
Play a custom match with these options: "Basketball" variant on Breadington Square
Play a custom match with these options: "Surf" variant on Porto Rada Beach
Play a custom match with these options: "Breaking slabs" variant on Panachado Forest
Play a custom match with these options: "Ice rink" variant on Tartembourg
Serve the ball with the Pressure Launcher at less than 5%.
The explosive ball hits four players in one blast
Have all toasters die at the same time in the "Lava" variant
Have all toasters die at the same time in the "Claustrophobia" variant
Play the "Electric ground" variant in custom mode 10 times in a row without taking any damage
Play the "Hell belt" variant in custom mode 10 times in a row without taking any damage