Here is the full list of all 14 Tezz: Portals achievements.
Complete the first level
complete all levels
First level with portal
Complete 50% of the levels
Complete a level with 2 blocks
Complete a level with 3 blocks
Complete a level with 4 blocks
Complete a level with 5 blocks
5 LEVELS
10LEVELS
15 LEVELS
20 LEVELS
25 LEVELS
30 LEVELS