Achievements

Achievements are awards given for successfully finishing a task.

Each achievement can give you 2 types of rewards: Each time you reach an achievement, a greater one will be proposed with more Dark matter.
 * Dark matter
 * +1% base production

Ex:
 * Level 1 : 1 Dark matter
 * Level 2 : 2 Dark matter
 * Level 3 : 3 Dark matter
 * Level 4 : 4 Dark matter