Trueman's victims include a large number of people he sent to the World of Darkness by materializing through the cards of duelists who have felt negative emotions and assuming their form, but not before getting rid of the original. When he does this, everyone who knew the person forgets they ever existed.
His victims from the main cast included: Taigo Sorano, Axel Brodie, Sartorius, Sarina and Tyranno Hassleberry.
At Duel Academy while looking a list of all students, Alexis, Chazz and Syrus seem to think there were more students once at the academy, yet can't remember any of the people they dueled that day. Atticus also present doesn't recall there being anymore than those listed.
While in Domino City, Axel Brodie looked up a list of names on a computer screen inside a van. The names on the list began to disappear one by one, as Trueman took them. Axel then dashed from the van and went to KaibaCorp. Here he found a list of people employed by KaibaCorp. Names on that list began to disappear, with Seto Kaiba's name being the only one to remain. Later Trueman's master Nightshroud, revealed that it created an artificial eclipse over the planet, with its own dark world blocking out the sun, which pulled all humans into the dark world. This left Jaden, Pharaoh the cat, and the immaterial Lyman Banner as the last life on Earth. It can be assumed everybody in Domino City and the world were revived after Jaden defeated Nightshroud.
Names from the lists include:
The list from inside the van
The KaibaCorp list