Riddle School 1-3:

Rated E: Comic Mischief

Concept: Riddle School is an escaping school simulator which uses rubber bands to make people blind and distractions.

Riddle School 4-Transfer 2:

Rated E10: Fantasy Violence, Crude Humor, Riddle School 4 has a Mild Blood Reference and slightly scary images (Yeddy)

Concept: Those games have Fantasical enemies like Aliens and all that with them aiming weapons and also crashing and killing people with mild blood images in the credits.