Level 10

Total Experience Required 13,576

Level 100 progress: 0.2%

This is roughly the same as:

Killing 23 people in Warzone, or...
Killing 24 people in Execution, or...
Killing 20 people in Wingman, or...
Scoring 4,849 points in Guardian, or...
Scoring 14,757 points in Annex, or...
Scoring 8,932 points in Submission.

Horde (TU4)

Completing 34 waves on Casual, or...
Completing 23 waves on Normal, or...
Completing 17 waves on Hardcore, or...
Completing 14 waves on Insane.

Or a combination of the above. Have fun!