Ill Niño's third album, One Nation Underground, combines metalcore, groove metal, and tribal influences. The album showcases their mastery of hooks and tension-building, with Santana-esque breaks. Their unique bilingual delivery sets them apart, and the guest appearance of Jamey Jasta from Hatebreed adds to the album's appeal. Additionally, tracks from the album have been featured in popular games such as Ghost Recon Advanced Warfighter and Arena Football. Notable songs include "All I Ask For," "Everything Beautiful," and "What You Deserve."
