This One's for Jenkins!

This One’s for Jenkins! is an achievement in Halo: Combat Evolved Anniversary. It is awarded for killing at least 50 Flood combat forms within the level 343 Guilty Spark, on Heroic difficulty or higher.

Trivia
The achievement references Private First Class Wallace A. Jenkins, a member of Fire Team Charlie who was infected by an Infection form and transitioned into a Flood combat form which was able to retain some of his former consciousness, and would later die on the Truth and Reconciliation. He is seen within the level 343 Guilty Spark, once John-117 would find his M4 field disk and witness Fire Team Charlie's encounter with The Flood through Jenkins' perspective of the incident.