Humanity's Greatest Mecha Warrior System - Chapter 1036 Determined Mary

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Armed with the memories of her past life, Gu Lingling returns to the 1970s, determined to break free from the bullying of her stepmother and stepsister and rewrite her own destiny. She's no longer the pushover she once was. With her intelligence and courage, she strides toward happiness. Her exquisite cooking and skillful sewing not only earn her the respect of those around her but also capture the heart of Yang Yunhai, who always seemed to be at arm's length. This time, she's not just changing her own fate; she's making those who once hurt her pay the price.A story of comebacks, sweet romance, and self-growth—it's filled with warmth and strength!

Chen Yan travels between worlds, ending up becoming an honorable prince in a medieval fantasy world. Yet this world was not quite as simple as he thought. Witches with magical powers abound, and fearsome wars between churches and kingdoms rage throughout the land.

Roland, a prince regarded as hopeless by his own father and assigned to the worst fief, spends his time developing a poor and backward town into a strong and modern city, while fighting against his siblings for the throne and absolute control over the kingdom. Join Roland as he befriends and allies with witches and, through fighting and even farming, pushes back invaders coming from the realm of evil.

- Description from Novelupdates

The game spoilers turned out to be fake. The characters I gathered thinking they were heroes are actually all villains. In other words, I accidentally created a villainous organization.