Is Halo: Reach Available on PlayStation 3?

No. Halo: Reach was developed by Bungie and published by Microsoft Game Studios as an Xbox 360 exclusive (2010). It has never been released on any PlayStation platform.

Where You Can Play It Today

• Xbox 360: Original disc or digital (backward compatible on Xbox One/Series X|S).
• PC (Steam / Microsoft Store): Via Halo: The Master Chief Collection (added 2019). Supports 4K/120 FPS, ultrawide, cross-play.
• Xbox Cloud Gaming: Stream to phone/tablet/PC with Game Pass Ultimate.

Why It's Not on PS3

• Halo is a flagship Xbox franchise owned by Microsoft.
• Bungie was a Microsoft first-party studio at the time (left in 2007, but Reach was already in development for 360).
• No port was ever commissioned; the engine (Halo Reach engine) is tightly bound to Xbox 360 architecture.

If you're on PlayStation and want a similar sci-fi FPS experience, look at Killzone 2/3, Resistance 1-3, or Destiny 2 (cross-platform).