How realistic is spaceflight in video games?

Video games are a great way for us to journey into the unknown of space, but how realistic is spaceflight in video games? 

As one of humanity’s greatest curiosities, video game developers have often explored the great unknown in their games. Whether it is initial attempts at single-line space graphics, such as Space Invaders or Asteroids, or the entirely immersive experience which some of the best space VR games have to offer, it has been the aim of many game studios to explore the unending boundaries of space. However, while numerous games let you explore the great unknown, they approach the subject of astrophysics with varying degrees of serious thought.