Here is the full list of all 37 Cublast HD achievements.
Watch a replay of someone else
Upload a level to the community
Finish stage two
Finish the first stage
Collect your first artifact
Finish level one
Find all artifacts
Collect 1000 blastpoints
Collect 10000 blastpoints
Collect 50000 blastpoints
Die 1000 times
Die in the first level
Achieve the #1 highscore on a popular level
Defeat your opponent in versus
Rate at least 100 different community levels
Watch 100 replays of other people
Finish co-op stage one
Finish co-op stage two
Finish co-op stage three
Finish stage three
Finish stage four
Finish stage five
Finish stage six
Finish stage seven
Finish stage eight
Finish stage nine
Finish stage ten
Finish versus stage one
Finish versus stage two
Finish versus stage three
Have one of your levels favorited
Have your levels favorited over 1000 times
Have one of your levels liked
Have your levels liked over 1000 times
Have someone play your level
Get your levels played for over 1000 times
Use up all your slots by uploading levels to unlock this achievement.