The inclusion of "IIII" instead of "IV" in the title "Call of Duty: Black Ops IIII" is indeed an intentional decision by the game developers. There are a couple of reasons behind this choice:
Branding and Aesthetics: The use of "IIII" aligns with the aesthetic and branding of the Call of Duty franchise, particularly the Black Ops sub-series. It creates a recognizable design element that stands out and adds to the overall visual impact.
Flow and Rhythm: "Black Ops IIII" has a smoother flow when spoken and maintains a consistent rhythm throughout the name. Using "IV" might have disrupted the cadence of the title.
Emphasis on the Number Four: The repetition of "IIII" visually emphasizes the number four, highlighting the fourth installment in the Black Ops series. It reinforces the significance of the "4" in the title.
Novelty and Attention: Using "IIII" instead of "IV" also generates interest and discussion among fans and consumers. It sets the game apart from other titles and makes it more memorable.
While it's not strictly following traditional Roman numeral rules, the choice to use "IIII" in the game title is a creative and strategic decision made by the developers to enhance the game's branding and overall appeal. It's an example of how game titles can sometimes bend or break conventions for marketing and aesthetic purposes.