| Hint | Name | Series |
| Worked for Group 935 and helped harness the extraterrestrial Element 115. | |
| Genius who creates legions of robots powered by small animals. | |
| Creates robots, but is oddly enough stopped by a robot. | |
| Created Mega Man, and once had a close relationship with his soon to be enemy. | |
| Aspiring robotic dictator who hates all organic life. | |
| Interestingly enough, being a doctor is only one of his choice careers. | |
| Valuable for creating weapons to use against the Combine. | |
| Played a fundamental part in the ADAM development process. | |
| A bloodthirsty lunatic with a bag over his head and a chainsaw in his arms. | |
| His scientific knowledge lies in the study of the Krogan genophage. | |