A Sony patent application has revealed the company's plans for biometric controllers. The patent proposes a system that would measure skin moisture, heart rhythm and muscle movement and send that information into games.

Weapons that become more accurate or less steady depending on your level of stress.

Tensing up your muscles to absorb an attack or power up shields.

Character changes based on biometric feedback, such as a character sweating when you're nervous.

A boost to run faster, jump higher and punch harder while stressed.

Rapid decreases in health if your stress increases.

Different attacks based on stress levels.

Background music that matches your stress level, or becomes more relaxing if you're stressed.

Scaling difficulty based on stress level.

The patent features designs for biometric feedback involving DualShock 3, PlayStation Move and a handheld reminiscent of the Vita. According to Siliconera , the following ideas are mentioned in the application:Sony hasn't commented on the patent, and it isn't clear when this type of control will be implemented, if at all.The last time biometric feedback was introduced to mainstream games was Nintendo's vitality sensor , which was announced at E3 2009 but never released.