Video games are said to affect our brains, but how do they affect our heart rate? Does different genres like Massively Multiplayer Online First-Person Shooter (MMOFPS), Hardcore MMOFPS, Simulation, Strategy or Survival cause different heart rates? Do they make us feel more relaxed, or more intense and excited? In this investigation, we aim to find out the answers to these questions. We used an Electrocardiography (EKG) sensor to measure the heart rate while the test subject plays the video game for 10 minutes. We repeated this using 5 different games, recording two graphs per game. From this experiment, we can conclude that different games do not result in different heart rates. However, there is a change of the subject’s heart rate when they are gaming compared to when they are relaxed. This could also help people know what is happening when they are playing video games, and discourage people to play video games before activities such as revision or sleeping as all video games increases our heart rate.