Housemarque and Nixxes developed Saros in close collaboration; one area was developing the set-piece bosses. Housemarque brought the creative vision, world, combat language, visual concepts, and signature bullet-hell DNA. Nixxes brought the bosses to life through encounter design, animation, environments, lighting, and technical implementation.

The result was a set of encounters designed to challenge players, surprise them, and deliver the kind of spectacle PlayStation players expect from a Housemarque action experience. Spoilers for the bosses of Saros ahead, so read at your own risk.

Boss fights in Saros are fully staged encounters, not just enemies with larger health bars, so that required close collaboration from the start. Housemarque handled boss concepts, visual direction, and VFX identity. Nixxes focused on animation, environments, technical design, boss behaviour, and attack implementation, with Housemarque’s final review and collaboration.

The road to developing a boss started with a briefing that outlined the vision, gameplay goals, and visual direction for the encounter. From there, Nixxes pitched its take, built early prototypes and first-playable versions, refining each encounter through iteration, playtesting, and polish until shipping.

When designing bosses for Saros, we followed a few guiding principles, starting with three distinct phases for every boss encounter, each with its own identity, changing how the encounter looks, feels, and plays.

A typical boss battle in Saros lasts about three to eight minutes (Saros: Zenith has a tighter arcade experience), with the challenge coming mainly from boss behaviour, arena transformation, environmental hazards, bullets, beams, and physical attacks. These were also designed to encourage players to use their shield, jumping, parrying, and dashing abilities, knowing that a good boss attack should make players move with intent, not in panic.

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