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| (Cosmic Gate) Unlockable: Special Stages | 100% | |
| Activate the warp gate in stage 64, you will then be transported to stage EE, followed by EF, F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, FA, FB, FC, FD, FE, FF, and 00. Complete 00 to return to Stage 1. | ||
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| Guadia Quest: Skip to the End FTW! | 100% | |
| Description: Are you an RPG hater that would rather just skip Guadia Quest altogether? Well, now you can! This cheat will satisfy the medal for winning the game fair and square, too. From the opening castle, Centraan, go northeast and follow the path around the mountains and back down along the ocean. On a peninsula in the far east is the Mausoleum. Enter it and walk exactly 9 steps to the north. Here, choose "Look" and a staircase will appear. Go down and talk to the man below. He will confirm you actually want to skip to the end, and do a bit of fourth-wall breaking. *** There is also a treasure chest down here with a unique item for you completionsts! | ||
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| Sound Mode | 100% | |
| Earn a "Clear" mark for all games (beat all game challenges) to unlock the Sound mode option in the main menu. | ||
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| Alternate Endings for Haguruman 1 and 2 | 100% | |
| Finish every stage in both Haguruman 1 and 2 with under 5 seconds remaining to unlock the games' respective alternate endings. | ||
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| Cosmic Gate Warp | 100% | |
| Fire 64 shots in the 1st stage without hitting any enemies to make a warp gate appear. It takes you to the final stage! | ||
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| Haggle Man 3 Cheats | 100% | ||||||
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| Rally King and Rally King SP Cheats | 100% | ||||||
| Invincibility: On Title screen, hold UP + LEFT + SELECT (together) Enemies wiped off the face of the earth: On Title screen, hold DOWN + RIGHT + SELECT (together)
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| Star Prince Invulnerability | 100% | |
| On Title screen, hold UP and input A (three times), release and then hold DOWN and input B (three times). | ||
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| Haggle Man 1 Cheats | 100% | ||||||||
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| Haggle Man 2 Cheats | 100% | ||||||||||
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| Cosmic Gate Power-Up | 100% | |
| PAUSE the game and input UP, UP, A, A, B, B. | ||
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Thrown back in time to the 1980's, you are turned into a young boy and forced to play video games by an evil self-proclaimed "Game Master", Game Master Arino. Game Master Arino will test your gaming skills by throwing various challenges at you in a wide-variety of retro games including shooters, racing, action and even an epic role-playing game - your only way to return is to defeat him in every retro game challenge he throws at you. But you are not alone in your quest-armed with access to gaming magazines, cheat codes can be found to warp to later levels, receive unlimited continues or even become invincible! A young Arino is at your side to keep you company during your challenges, quite amused at the fact that he grows up to be so evil in the future to be the cause of your current predicament. Test your skills with the awesomeness of the 8-bit era and prevent the retro games from exacting their revenge! An original game based on the popular Japanese GAME CENTER CX TV series, Retro Game Challenge reinvents how classic games are played by having the player complete short challenges in a wide-variety of games to keep the game play fresh and rewarding. Specific challenges in shooters, racing, action and a role-playing game are integrated into the story, while the in-game magazines offer cheat codes as well as fake 80's news stories paying tribute to the rich history of the gaming industry. Whether it's 80's nostalgia for the seasoned gamer or experiencing classic 8-bit game play for the first time, Retro Game Challenge has something for everyone. 
