The graphics in this video game are incredibly ______! They look so realistic.

The appropriate word to fill in the blank in the sentence is "detailed."

The sentence, "The graphics in this video game are incredibly detailed! They look so realistic," suggests that the graphics possess a high level of complexity and intricacy, which contributes to their realistic appearance.

When we say graphics are "detailed," it implies that there are numerous visual elements, textures, and features that enhance the lifelike quality of the game's images. Detailed graphics can include sharp textures, complex lighting effects, and realistic character models that all work together to create an immersive experience for the player.

Using "detailed" also conveys the idea that the designers of the game have put a significant amount of effort into creating a visually rich environment that captures the nuances of the real world, making the gaming experience more engaging.