Is Killzone on Xbox 360? No—It's PlayStation Exclusive (+ Alternatives)

No. The Killzone franchise (Guerrilla Games / Sony Interactive Entertainment) is exclusive to PlayStation consoles.

Killzone Series Lineup

• Killzone (2004) — PS2
• Killzone: Liberation (2006) — PSP
• Killzone 2 (2009) — PS3
• Killzone 3 (2011) — PS3
• Killzone: Shadow Fall (2013) — PS4 (launch title)
• Killzone: Mercenary (2013) — PS Vita

No Killzone game was ever released on Xbox, Xbox 360, Xbox One, or Xbox Series.

Xbox Alternatives for Sci-Fi FPS Fans

• Halo Series (Xbox / PC / Cloud) — Xbox's flagship FPS.
• Gears of War Series — Cover-based, visceral shooter.
• Titanfall 2 — Movement mastery, mechs, stellar campaign.
• Destiny 2 (Free-to-Play) — Shared world, loot, raids.
• Battlefield 1 / 4 / 2042 — Large-scale warfare, vehicles.