There is no official Attack on Titan game released for the (PlayStation Portable). However, fans have created several ways to experience the series on Android using the PPSSPP emulator and dedicated mobile fan games. Most Popular "Attack on Titan" Options for Android Attack on Titan 2 (Fan-made PPSSPP ISO)
Once you find a link (typically on sites like CDRomance or Internet Archive), download the file directly to your phone. Use a download manager if the file is large. download game attack on titan ppsspp android full