Two-dimensional (2D) games have been around since the 1980s, before most modern video games on consoles and PC. 2D games have evolved in many ways over the years, with some famous titles such as 'Super Mario Bros.' or 'Street Fighter II'. The main aspect of the 2D game is that the game play is in a two-dimensional plane, which often uses either pixelated sprites or hand drawn graphics. While 3D games provide a more immersive experience, 2D games still remain popular due to their simpler design, allowing for more creative game play and innovative mechanics.