Heartbreaker

"Invisible to heartbeat sensors."

- Cut description.

Heartbreaker is a cut perk from Call of Duty: Modern Warfare 2 and Call of Duty: Modern Warfare 3. The console name is "heartbreaker". The perk would've made the player immune to Heartbeat Sensors. The icon is almost identical to Assassin, and seeing as how the effect is identical to one of Assassin's, it is most likely an early or cut version of the perk.