Maxx Karnage Achievement
Collect 20 Hazard pickups.
Hazard pickups increase your strength and damage. "QA" will notify you when one has been hacked into the game. You shouldn't have any trouble finding them as they glow red. Once you run near it you will be upgraded and glow red yourself.
If you find one of these near a checkpoint, you can die and recollect the same one over and over until you hit 20 pickups.