Battle grunts sit in a strange spot in game audio. Players rarely notice them consciously, yet their absence or cheap repetition immediately feels wrong. A well-timed hit reaction, a short effort on a heavy swing, or a varied death cry sells the weight of combat far more effectively than most dialogue. These non-verbal performances—often called efforts, onos, or combat vocalizations—demand a different approach from scripted lines, and the industry still treats the work unevenly.
Voice actors who handle this material routinely report the same problems. Prolonged shouting, screaming, and forceful exertions produce hoarseness, inflammation, and longer recovery times. A 2025 survey of video game voice actors published in the Journal of Voice found that more than 80 percent were required to yell, grunt, scream, use loud voice, or groan on projects. Recovery after intense sessions commonly stretched two days or more. Canadian performers, through ACTRA Toronto’s vocal stress work, have described sessions heavy with death screams and battle roars that left little room for recovery protocols. Inconsistent studio practices compound the issue: levels that clip, limited breaks, and extremes scheduled early in a long booking all raise the risk of temporary damage and lower-quality takes.
The technical side of the problem is straightforward. Recording too hot into the microphone produces distortion that sound designers cannot fully repair. Game audio pipelines often target perceived loudness in the neighborhood of –18 to –23 LUFS for consistency across platforms, yet raw combat efforts recorded without headroom or proper mic technique leave little dynamic range for mixing and variation pools. Players notice when every sword hit or fall produces the same clipped shout.
Experienced directors and performers have developed practical habits that protect the voice while still delivering usable material. Preparation begins before the booth. Actors who treat the work like physical stunt performance warm up with lip trills, gentle sirens, and light physical movement—push-ups or jogging in place—to engage breath support and body tension. Diaphragmatic breathing keeps the power coming from the core rather than the throat. Open vowels (“ah,” “oh,” “uh”) and visualization of the specific impact (gut punch versus face strike versus fall) produce more natural variation without slamming the vocal folds together.
Session structure matters as much as technique. Many directors now place the most extreme material—death cries, fire screams, high-intensity battle chatter—at the end of the booking so the actor’s voice remains fresher for dialogue and lighter efforts. Short blocks with real breaks (ten minutes per hour of heavy work is a common recommendation from ACTRA guidance) allow recovery. Hydration, room-temperature water, non-menthol lozenges, and throat-coat tea are standard provisions in careful studios. Some productions bring in vocal coaches familiar with combat technique for performers new to the demands; pilot studies of Vocal Combat Technique training have shown measurable reductions in self-reported symptoms and improvements in acoustic measures after relatively short instruction.
Variation is another practical necessity. A single perfect grunt repeated across dozens of hits quickly becomes noticeable. Directors and sound teams therefore capture pools of related efforts that differ in pitch, length, intensity, and character. Reference animation or gameplay footage helps actors match timing and physicality. Phonetic scripting—listing specific consonant-vowel combinations suited to particular actions—gives structure without forcing full sentences, reducing mental load while keeping performances grounded.
These practices are not universal. Smaller teams or tight schedules sometimes still treat efforts as an afterthought, resulting in either under-recorded material or vocally costly sessions. Larger productions that invest in clear briefs, reference libraries, loudness targets, and post-session care tend to get cleaner assets and healthier talent relationships. The same principles apply when localizing a game: combat efforts must feel culturally and linguistically natural while matching the original performance intensity and timing. Poorly adapted or over-compressed localized grunts undermine immersion just as quickly as weak original ones.
Studios that treat battle grunts as a specialized craft rather than filler produce more believable combat and reduce the chance of actors needing extended recovery. The data from performer surveys and the growing body of technique-focused research point in the same direction: preparation, pacing, breath support, and intelligent scheduling protect the instrument and improve the final audio.
Artlangs Translation has spent more than twenty years supporting global game and media projects across 230-plus languages with a network of over 20,000 professional linguists and voice specialists. The company’s work spans full translation services, video localization, short-drama subtitle localization, game localization, multilingual dubbing for short dramas and audiobooks, and multilingual data annotation and transcription. Teams familiar with the demands of non-verbal performance and high-intensity vocal material help studios maintain consistency and quality when combat efforts, character voices, and supporting audio move across languages and markets.
