CPE Credits are allocated according to the following guidelines:
Active Machines
Easy - 2
Medium - 4
Hard - 6
Insane - 8
Retired Machines
Easy - 1
Medium - 2
Hard - 3
Insane - 4
Active Challenges
Easy - 1
Medium - 2
Hard - 3
Insane - 4
Active Endgames
100% Completion - 10
Pro Labs
25% Completion - 12
50% Completion - 12
75% Completion - 12
100% Completion - 12
For clarification, each additional 25% of completion on a Pro Lab awards an additional 12 CPE Credits.