Because this is an .nsp file contained in a .rar archive, it is intended for use on a modded Nintendo Switch console or a compatible PC emulator (like Ryujinx). You will need to extract the .rar file using software like WinRAR or 7-Zip to access the playable game file.
The specific file you referenced— [01003BC018126000][v0][US].nsp.rar —is a compressed Nintendo Switch package file (.NSP) for the base version of the game. 🦖 Game Overview Kaiju Wars [01003BC018126000][v0][US].nsp.rar
: The campaign yields roughly 15 to 20+ hours of gameplay, featuring custom map editors and weekly challenges to keep you busy. ⚠️ Things to Keep in Mind Because this is an
that acts as a brilliant, campy love letter to classic monster movies. Kaiju Wars [01003BC018126000][v0][US].nsp.rar