Unlockable - Valgas, Kraken, Mel and Pride in Powerstone 2 | |
| Pride & Kraken | finish 1on 3 mode with Falcon. |
| Valgas | finish 1 on 3 mode with Kraken |
| Mel | finish 1 on 3 mode with Pride |
Unlockable - Unlockable Characters | |
| Pete | Beat the game once with any character. |
| Accel | Beat the game with Gourmond |
| Gourmond | Beat the Game with Julia |
| Julia | Beat the Game with Pete |
Unlockable - Unlock the two '???' mini games | |
| Ayame's Shuriken mini game | obtain at least 500 medals |
| Gunrock's Slot mini game | obtain at least 1000 medals |
Unlockable - Unlock Original Special Weapons From PS1 | |
| Ray Gun | Beat Game Once |
| Nyoi-Bo | Beat Game Once |
| Machine Gun | Beat Game Once |
| Power Shield | Beat Game Once |
Unlockable - Unlock Bosses - Power Stone One | |
| Kraken | Complete the game with all characters (Except PS2 Characters) |
| Valgas | Complete the game with Kraken |
| Final Form Valgas | Complete the game with Valgas |
Unlockable - Bonus PSP Items | |
| Soccer Ball | Beat the game with Falcon |
| Crystal Ball | Beat the game with Rouge |
| Twin Potion | Beat the game with Wang-Tang |
| Totem Hammer | Beat the game with Galuda |
| Giant Boots | Beat the game with Gunrock |
| Amenomurakuno | Beat the game with Ryoma |
| Decoy Bomb | Beat the game with Ayame |
| Maches Chainsaw | Beat the game with Jack |
| Thunderbolt Rider | Beat the game with Accel |
| Wok Gun | Beat the game with Gourmand |
| Turbo Helmet | Beat the game with Pete |
| Stone Sweeper | Beat the game with Julia |
