1. Introduction of the game:
Ultimate Custom Night is an immensely popular survival horror video game that takes place in a terrifying setting filled with animatronic characters. The game is known for its intense gameplay, challenging levels, and the unique ability for players to customize their gaming experience.

2. All characters and levels of the game:
Ultimate Custom Night features an extensive roster of characters, each with their own unique set of behaviors and attacks. The game includes beloved characters from the entire Five Nights at Freddy's series, such as Freddy Fazbear, Bonnie, Chica, Foxy, and many more. With over 50 characters to choose from, players can mix and match their favorite animatronics to create their own customized challenges.

3. What attracts users most to the game:
The game's main attraction lies in its high level of customization. Players have the ability to select their own difficulty level by adjusting the A.I. difficulty of the animatronics, creating a truly personalized and challenging experience. This freedom to create the perfect nightmare scenario is a major draw for fans of the series.

4. Why it is popular:
Ultimate Custom Night has gained immense popularity due to its thrilling and intense gameplay, the nostalgic appeal of having all the iconic characters in one game, and the joy of creating unique challenges. The game's success is also attributed to its highly engaged and dedicated community, fostering a sense of camaraderie and competition among players.

5. When the game was released and how many versions are currently available:
Ultimate Custom Night was released on June 27, 2018, for Microsoft Windows. As of now, there have been no additional versions released, but the game continues to receive updates and improvements to enhance the user experience.

6. The most difficult part of the game:
The most challenging aspect of Ultimate Custom Night lies in its strategic gameplay. Players must manage limited resources, constantly monitor cameras, and strategically close doors and vents to survive against the relentless onslaught of animatronics. The game requires quick decision-making, sharp reflexes, and a deep understanding of each character's behavior, making it a formidable challenge for even the most experienced players.

7. Strengths and weaknesses of the game:
The game excels in providing players with a high level of customization, capturing the spirit of the series, and offering a thrilling and intense gameplay experience. However, some may find the game's steep learning curve and difficulty level to be overwhelming, potentially discouraging newcomers or those seeking a more casual experience.

8. Other games developed by the same developer:
Ultimate Custom Night was developed by Scott Cawthon, who is best known for creating the Five Nights at Freddy's series. Cawthon has also developed other popular games within the franchise, including Five Nights at Freddy's, Five Nights at Freddy's 2, Five Nights at Freddy's 3, and Five Nights at Freddy's 4, among others.