Game design, a subset of game development, is the process of designing the content and rules of a game in the pre-production stage and design of gameplay, environment, storyline, and characters during production stage. wikipedia.org

3D modeling (also known as meshing) is the process of developing a mathematical representation of any three-dimensional surface of object (either inanimate or living) via specialized software. wikipedia.org

Blender is a free and open-source 3D computer graphics software product used for creating animated films, visual effects, interactive 3D applications or video games. wikipedia.org

Roblox is a game creation platform which allows players to create their own games using its proprietary engine, Roblox Studio. wikipedia.org

3D computer graphics are works of graphic art that were created with the aid of digital computer and specialized 3D software. In general, the term may also refer to the process of creating such graphics, or the field of study of 3D computer graphic techniques and its related technology. wikipedia.org

Computer animation is the process used for generating animated images by using computer graphics. wikipedia.org

Skeletal animation is a technique in computer animation in which a character is represented in two parts: a surface representation used to draw the character and a hierarchical set of interconnected bones used to animate the mesh. wikipedia.org

Animation is the rapid display of a sequence of images of 2-D or 3-D artwork or model positions in order to create an illusion of movement. The effect is an optical illusion of motion due to the phenomenon of persistence of vision, and can be created and demonstrated in several ways. wikipedia.org

Unity is an integrated authoring tool for creating 3D video games or other interactive content such as architectural visualizations or real-time 3D animations. wikipedia.org

Character animation is a specialized area of the animation process, which involves bringing animated characters to life. wikipedia.org

Game development is the generally involved and lengthy process of creating a video game. Development is undertaken by a game developer, which may range from a single person to a large business. wikipedia.org