Character concept artCharacter designers need concepts to begin their work. Even though early sketches can be rather primitive, they still should demonstrate the hero's traits and features. Creature game design concept art includes anatomical features, color schemes, clothing, and armor sets. Character concept artists do it all, and that's a lot of drawing. Alas, the majority of such concepts are rejected, but it is a normal flow for concept makers.
Environment concept artEvery game takes place in a certain setting, so someone must illustrate it according to the script and lore. Environment concept artists are in charge of the initial visualization of landscapes, architectural objects, and elements that set the tone of the game. In order to conceptualize cool fictional places, one needs vivid imagination and skills to draw from simple words on paper. Other designers will continue working on this basic imagery, turning it into digital art that will be added to the game.
Prop concept artSculptures of fantasy demigods, decorated bottles with magic potions, barrels with wine, and other smaller objects that fill the environment are called props. Take them all away, and the world will look empty and lifeless. Prop designers create all these little things to add extra flavor to the game environment. This type of concept art for games is arguably the most creative and open to experiments with style as designers draw inspiration from thousands of objects that exist(ed) in our world. Obviously, there are some limits to creativity, and you cannot mindlessly add something like firearms to a medieval setting without justification. Anyway, all props must feel right and be in line with the design code of the game.
Vehicles also fall in the equipment category, by the way. Drawing a believable machine requires experience with traditional vehicle production, at least at a basic level. Cars, ships, jets, and other aircraft have distinctive designs, so you cannot take away wheels or wings and expect people to believe that such constructs would work even in a fantasy world. Creativity must be believable, and it must be backed up by knowledge.
AbstractThis concept art style utilizes various shapes and forms. It forces players to guess the purpose and functionality of some elements in games because there is no clear image or explanation attached to them. Their functions will be revealed later as you spend some time playing.
StylizedYou have probably played Super Mario Bros. or at least seen it on the Internet. It is a perfect example of stylized art. Games that go with this style have cartoonish, generally exaggerated graphics. They draw inspiration from comics and caricatures so that game elements may look absurd and unusual.
RealisticYou know what it is all about and definitely have played not one game that looks realistic. The game world, characters within it, their equipment, and all objects around try to replicate the things from real life as close as possible. This is the go-to art style for most modern first-person shooters and action adventures (Resident Evil, Death Stranding, Cyberpunk 2077, etc.). Various simulator games also love being realistic, for example, Forza Horizon 5 or Microsoft Flight Simulator.