Mom plays X-Men Legends, another family favorite from the Xbox/PS2/Gamecube era. This is one of the best co-op beat-em-ups ever made. Raven Software somehow managed to create a cohesive, lore-based X-Men story that was compelling and fun to play through. Loaded with secrets and collectibles; and, except for the character sprites (up close), gorgeous to look at.
Videos 1 - 4 cover Chapter 1: The rescue of Allison, escape from New York, and the tour of the Xavier Institute.
Videos 5 - 7 are the first few Danger Room levels, and the outdoor areas of the H.A.A.R.P. Facility Mission, which is Chapter Two.