This article is a proof-of-concept that archaeologists can now disseminate archaeological topics to the public easily and cheaply through video games in teaching situations or in museum or heritage communication. We argue that small but realistic, interactive, and immersive closed- or open-world 3D video games about cultural heritage with unscripted (but guardrailed) oral conversation can now be created by beginners with free software such as Unreal Engine, Reality Capture, and Convai. Thus, developing tailor-made “archaeogames” is now becoming extremely accessible, empowering heritage specialists and researchers to control audiovisual dissemination in museums and education. This unlocks new uses for 3D photogrammetry, currently mostly used for documentation, and could make learning about the past more engaging for a wider audience. Our case study is a small game with two levels, one built around 3D-scanned Neolithic long dolmens in a forest clearing and an archaeologist and a prehistoric person, who are both conversational AI characters. We later added a more open level with autonomous animals, a meadow, and a cave with a shaman guiding the player around specific cave paintings. We tested the first level on players from different backgrounds whose feedback showed great promise. Finally, we discuss ethical issues and future perspectives for this format.