Level 29

Total Experience Required 120,435

Level 100 progress: 1.76%

This is roughly the same as:

Killing 201 people in Warzone, or...
Killing 205 people in Execution, or...
Killing 171 people in Wingman, or...
Scoring 43,013 points in Guardian, or...
Scoring 130,908 points in Annex, or...
Scoring 79,234 points in Submission.

Horde (TU4)

Completing 302 waves on Casual, or...
Completing 201 waves on Normal, or...
Completing 151 waves on Hardcore, or...
Completing 121 waves on Insane.

Or a combination of the above. Have fun!