A potential collaboration between Activision and the Halo franchise is unconfirmed, but reports suggest that Call of Duty studio Sledgehammer Games worked on a Halo multiplayer prototype prior to its cancellation. The project, which reportedly never moved past the early blockout phase, was under consideration by Xbox before being shelved in July 2026.
Source Reliability
This report originates from YouTuber Rebs Gaming, citing a source previously linked to accurate information regarding Halo: Campaign Evolved. Given that the claim remains unverified by Microsoft and involves internal prototype decisions, it is categorized as a high-confidence rumor (70/100) regarding historical development activity, but not confirmed studio strategy.
Project Status and Context
According to the report, the prototype focused on basic gameplay mechanics during its testing phase in June 2026. Microsoft ultimately opted not to greenlight the project one month later. While this specific prototype was cancelled, the report notes that Microsoft is still exploring the possibility of utilizing Activision studios to assist in future Halo development, though nothing has been officially authorized.
This information surfaces as Microsoft continues to navigate broader changes within its gaming division, including significant workforce reductions across its studios. The potential for cross-studio collaboration remains a subject of industry speculation as the company re-evaluates its long-term strategy for the Halo brand.