To put it bluntly: A fully functional, full-version of Tekken 5 cannot fit into 100 MB.

Since the actual game data for Tekken 5 is much larger, a 100 MB file usually falls into one of these categories:

Unfortunately, the keyword "tekken 5 download 100 mb new" is a goldmine for hackers. A 100 MB executable is the perfect size to hide a Trojan, keylogger, or cryptocurrency miner. Many "download" sites promise the game but deliver a virus that hijacks your browser or steals passwords.