Here is the full list of all 48 Tiltagon achievements.
Get 2 stars on level 8
Get 1 star on level 8
Get 2 stars on level 5
Get 3 stars on level 5
Get 20 points in Hard+
Get 30 points in Hard+
Get 50 points in Hard+
Get 1 star on level 7
Get 2 stars on level 7
Get 3 stars on level 7
Get 1 star on level 6
Get 2 stars on level 6
Get 3 stars on level 6
Get 10 points in Hard+
Get 1 star on level 5
Get 3 stars on level 4
Get 2 stars on level 4
Get 1 star on level 4
Get 3 stars on level 3
Get 2 stars on level 3
Get 1 star on level 3
Get 30 points in Hard
Get 20 points in Hard
Play 10 games
Get 10 points in Hard
Play first game
Get 3 stars on level 2
Get 1 star on level 2
Get 2 stars on level 2
Get 1 star on level 1
Get 2 stars on level 1
Get 3 stars on level 1
Get 3 stars on level 8
Get 1 star on level 9
Get 2 stars on level 9
Get 3 stars on level 9
Get 1 star on level 10
Get 2 stars on level 10
Get 3 stars on level 10
Play 100 games
Play 500 games
Play 1000 games
Play 5000 games
Get 50 points in Hard
Get 75 points in Hard
Get 100 points in Hard
Get 75 points in Hard+
Get 100 points in Hard+