Many "100MB" downloads found online are "highly compressed" archives (often in .7z or .rar format) that extract to the full game size (typically around 1GB). To install it on your Android or PC: There Is an Ultimate Ninja Impact 2?!?
A legitimate compressed version of the original Ultimate Ninja Impact (not a "2") can be found in CSO format around . A true 100MB file would lack FMVs, have mono audio, and possibly crash during boss fights. Many "100MB" downloads found online are "highly compressed"