Download size

How many GB is My Grandparents' Christmas Mystery?

3 GB

That is less than the typical Adventure game, which needs about 5 GB.

Leave at least 9 GB free: games need headroom to unpack updates.

The figure is the storage Steam lists as required for this game, not a measured download.

Grandma never showed up and Grandpa's tragic passing 3 days later left me in anger, confusion and sadness. I couldn't just let this go like it never happened, so I decided to go and find out what happened on my own. Will you survive a first-person psychological horror game and uncover the mystery?