Games do count on the fact that they can be informative even with little information for the player, for example; the game could tell the story of World War II or the murder of someone that happened and the game leads to the the player figuring out who the killer was. Though games like these may or may not exist, because most games are based on fiction, but could ultimately lead to a lesson. Game developers add small little hints that most do not pick up on, but if they are found from analyzation can mean something.
Video games are a form of interactive fiction which is an electronic literature piece therefore counts as part of Digital Humanities. Players interact with the game to find the end of the story. Some games are lacking a story, but that does not mean games do not count. A majority of games have a backstory that therefore introduces the goal of the game or the game could tell the story during the playing. Some games also have 'missions' that could resemble a chapter in the story. It is a stopping point that allows the reader to either stop and continue later or continue immediately. Video games are like movies that can be changed by the player or played out in first person whereas a movie plays it out for the watcher, same as a book. The only difference between games and movies and books is that the first person player holds the story.