Video game animation is the process of making and changing pictures to make it look like a video game is moving and interacting. There are two ways to make animation for video games: 2D animation and 3D animation.
2D animation is the way video games have always been animated. Each frame is drawn by hand or with a computer tool. Games with a grainy or retro look, like platformers, RPGs, and fighting games, often use 2D animation. Adobe Animate and Blender are both types of 2D animation tools.
The new way to make animations for video games is with 3D animation, where each frame is made by a computer program based on a 3D model. 3D animation is often used in games like shooters, racing games, and adventure games that are meant to feel real or bring the player into the game. Autodesk 3ds Max5, Autodesk MotionBuilder5, and Houdini5 are all kinds of 3D animation tools.
The main difference between animation for games and animation for movies is that animation for games has to be interactive and respond to what the player does, while animation for movies is pre-rendered and set. Game animation also needs to be optimized for speed and memory, while movie animation can be more detailed and complicated. Game animation requires more technical skills and knowledge of game engines and code, while movie animation needs more artistic skills and knowledge of storytelling and cinematography.