In Resident Evil 1, 2, 3, 1 Remake, 7, 2 Remake, 3 Remake, and Village, the player's health is shown in the inventory menu/status screen, and is represented by an electrocardiogram (ECG). It goes from Fine (green, full health) to Caution (yellow/orange, half health) to Danger (red, low health). It is also indicated by the character's animation in the previous RE games or the amount of blood on screen in Resident Evil 7 and onwards. Resident Evil 4, 5, and 6 don't use the ECG-styled health bar, so they used gauges instead. What is Resident Evil? Resident Evil is a survival horror game franchise made by Capcom since 1996. Most of the games feature virus breakouts, zombie apocalypses, and bio-weapons. There has also been remakes for Resident Evil 1, 2, 3, and 4. The franchise is rated M for Mature for having blood, gore, horror themes, and body horror, so I don't recommend trying it out unless you're older.
CREDIT TO: Capcom for the Resident Evil franchise. NOTE: If you want to use these for your games, feel free to ask and give credit.