Try Again Achievement
Revive yourself 10 times
Reviving yourself will cost you a minimum of 200 Gru coins. When you die, you will have a short amount of time to revive yourself for 20 Gru coins. If you die again the cost will double (i.e. 20 -> 40 -> 80, etc.)
Alternatively, you can buy certain costumes that will give you the first revive free each time you play a level. But this solution is even more expensive. The "Dad" costume will cost 1,200 Gru coins.