Granny Simulator is a two-player game that pits a feeble old grandmother against her lovely grandson. The grandmother's objective is to complete her everyday routine while the grandson uses uncanny violence and pure brutality to stop her. The grandmother can find items around the house to help fend off her grandson as she completes her objectives. The grandson can also pick up objects to throw at his grandmother; some items are locked in containers that require keys hidden around the map.