You can often find the official Japanese releases and expansions directly from the developer, Technobrain , which ensures you are supporting the creators of the sim.
Some simulation games offer free trials or "Lite" versions so you can play without any cost or risk. You can often find the official Japanese releases
Several websites offer free download links for "I Am An Air Traffic Controller 3" with all airports unlocked via torrent. However, be cautious when using these sources, as they may pose risks to your computer's security or violate copyright laws. be cautious when using these sources