Returning: Take your pills
One element of modern shooters that hasn't been added to the formula, though, is regenerating health. Plenty of developers have used it in recent years to augment the stop-and-pop gameplay of cover-based studios, but Rockstar felt that sticking with the traditional pill-based health system would appeal to fans and present more of a challenge.
Max's health is one of the only HUD elements you'll ever see on the screen, and popping some painkillers (found scattered throughout the missions) will restore it by about half. It's old school as hell.