In TMNT I got 4 achievements by playing through 2 levels and using 2 turtles special moves the first time. Extremely easy 120G!
After time spent with the Mutant Turtles decided to fire up another Lego game that was shelved for almost 4 and half years. Last achievement from Summer 2009:
After consulting well informed sites in internet and after some dedicated grinding I unlocked 4 out of the missing 7 achievements:
If I can do the last 3 achievements tomorrow, then this game is completed 100% :)