Got 9 kills with an HVS I picked up off the ground, 7 with my USP, 3 with good ol' Phase Rifle (27 headshots away from Tuning), and 1 enemy I meleed to death. I got my last kill right before the game ended. There was 3-4 enemies most of the time, but at the end it was down to 2.
Monster Hunter Tri is one of the best Capcom games of this generation. Of course, that's not saying much.