History of Big Game Hunter

Big Game Hunter is a Gambit medal and triumph: defeat three powerful enemies within a short time period. The medal must be earned 5 times (the triumph tracks "Medals earned (0/5)").

How to complete

1. Play Gambit matches and look for the Speed medal category.
2. The Shacknews guide in the sources suggests: focus on quick clears of powerful enemies. Powerful enemies are the stronger combatants (such as Ultra-rank or Major enemies); the exact definition of "powerful" and the time window are not stated in the sources I opened.
3. Use high-damage weapons and a Super to chain three kills quickly, then repeat until you have earned the medal five times.

Notes

The source lists it under Speed medals in Gambit and Gambit Prime. It is not confirmed which seal it counts toward.