1. Introduction of the game:
Geometry Dash SubZero is an adrenaline-pumping rhythm-based platformer game that offers a thrilling and challenging gaming experience. As the player, you will control a geometric shape avatar, navigating through various levels filled with deadly obstacles and intense music. Jump, fly, and flip your way to victory in this highly addictive game.

2. All characters and levels of the game:
Geometry Dash SubZero features a range of unique characters, each with their own distinct abilities and styles. From the iconic Cube to the swift Ship and the nimble Ball, players can choose the character that resonates with their playstyle. Moreover, the game offers a diverse array of levels, each more electrifying than the last, giving players plenty of content to conquer.

3. What attracts users most to the game:
One of the most appealing aspects of Geometry Dash SubZero is its seamless integration of challenging gameplay with captivating music. The synchronization between the obstacles and the rhythm of the songs creates an immersive experience that keeps players engaged and motivated to overcome the toughest trials. The game's emphasis on quick reflexes and precision adds an extra layer of excitement, making it a favorite among gamers.

4. Why it is popular:
Geometry Dash SubZero's popularity stems from its addictively challenging and rewarding gameplay. The game's intuitive controls coupled with its visually appealing design provide an accessible yet stimulating experience for players of all skill levels. Additionally, its online community, which allows players to create and share their own custom levels, contributes to the game's ever-growing popularity.

5. When the game was released and how many versions are currently available:
Geometry Dash SubZero was released on December 21, 2017, and it is the third installment in the Geometry Dash series. Alongside this version, there are currently two other versions available: Geometry Dash and Geometry Dash Meltdown, each offering their own unique gameplay and challenges.

6. The most difficult part of the game:
The most difficult part of Geometry Dash SubZero is the combination of intricate level designs and intense gameplay mechanics. Players must navigate through increasingly complex and fast-paced obstacles while staying in sync with the rhythm of the music. Maintaining concentration and precise timing becomes crucial to overcome the hardest segments of each level, making it a true test of skill.

7. Strengths and weaknesses of the game:
Geometry Dash SubZero's strengths lie in its addictive gameplay, vibrant visuals, and the ability to create and share custom levels. The game also provides a high degree of replayability, thanks to its challenging nature. However, some may consider its steep learning curve and fast-paced mechanics as potential weaknesses, as they can initially overwhelm new players.

8. What other games have been developed by the same developer:
Geometry Dash SubZero is developed by RobTop Games, the same talented team responsible for the creation of other popular games in the Geometry Dash series. These include Geometry Dash, Geometry Dash Meltdown, Geometry Dash World, and Geometry Dash Lite, all of which have amassed a dedicated fanbase worldwide.