Here is the full list of all 47 TRUFFLE achievements.
Complete Level 20
100% TRUFFLE
Complete Level VI
Collect All Watching Eyes in Level 20
Complete Level IV
Complete Level III
Complete Level 19
Collect All Watching Eyes in Level 19
Complete Level 18
Collect All Watching Eyes in Level 18
Complete Level 17
Collect All Watching Eyes in Level 17
Complete Level 16
Collect All Watching Eyes in Level 16
Complete Level V
Complete Level 15
Collect All Watching Eyes in Level 15
Complete Level 14
Collect All Watching Eyes in Level 14
Complete Level 13
Collect All Watching Eyes in Level 13
Complete Level 12
Collect All Watching Eyes in Level 12
Complete Level 11
Collect All Watching Eyes in Level 11
Complete Level 10
Collect All Watching Eyes in Level 10
Complete Level 9
Collect All Watching Eyes in Level 9
Complete Level 8
Collect All Watching Eyes in Level 8
Complete Level 7
Collect All Watching Eyes in Level 7
Complete Level II
Complete Level 6
Collect All Watching Eyes in Level 6
Complete Level 5
Collect All Watching Eyes in Level 5
Complete Level 4
Collect All Watching Eyes in Level 4
Complete Level 3
Collect All Watching Eyes in Level 3
Complete Level I
Complete Level 2
Collect All Watching Eyes in Level 2
Complete Level 1
Collect All Watching Eyes in Level 1