As a business, Microsoft regularly considers what it can do to make the most possible money and improve the size, profile, and reputation of its brand, and one idea the company contemplated was bringing Halo to PlayStation.

Former Xbox executive Peter Moore told IGN that Microsoft, years ago, had “conversations about Halo on PlayStation,” adding that Microsoft was “constantly” considering its options. Microsoft even hired the consultancy company McKinsey to create a “wargames” scenario where Microsoft’s executives spent a couple days on a retreat trying to better understand the competition.