The "NSP" extension indicates a digital game format native to the Nintendo Switch. Files labeled with "" typically originate from a popular community site known for hosting console backups and ROMs.
Originally released in 2018, it arrived on the Nintendo Switch Store on June 15, 2021. Understanding the File: NSP & ROMSLAB Strange-BrigadE-NSP-ROMSLAB.rar
It combines classic "Left 4 Dead" style wave-based combat with "Indiana Jones" inspired tomb exploration and puzzle-solving. The "NSP" extension indicates a digital game format