After the futuristic madness of Nitro Ball and its space pinball tables, the One Credit Challenge takes a turn toward puzzle gaming! Risky Challenge (Irem, 1993), known as Gussun Oyoyo in Japan, drops us into an underground world where reflexes and strategy are essential to save a very clumsy treasure hunter.

In this puzzle game with platforming elements, Vic and Vinnie are two treasure hunters trapped in a flooding underground cavern. The player must save them by dropping Tetris-like blocks to build a path to the exit, while the water rises relentlessly from below. The real challenge lies in the character’s behavior, as he moves on his own, in the style of Lemmings: the player must therefore anticipate movements to prevent him from falling into traps.

Designed for Irem’s M-97 arcade system, Risky Challenge delights with its kawaii visual style reminiscent of Bubble Bobble and its more than thirty varied stages, each offering a distinct puzzle challenge. Initially released only in arcades, the game later received several console ports and even spawned a PlayStation sequel in 1996, Gussun Paradise. A true arcade puzzle gem that the One Credit Challenge invites us to rediscover with a single credit!

🏆 Challenge Rules

Your goal is to achieve the highest score on a single credit.
The challenge runs from February 1st to February 15th at 11:59 PM. You may try as many times as you like.

📢 How to participate?

• Launch the game (rom: riskchal)
• Play and try to beat the high score
• Take a screenshot or photo of your final score
• Share your score in the Discord channel #challenges along with your username and score

⚖️ Rules to follow

To ensure fairness in the challenge:

The score must be achieved on a single credit, without save states, rewind, cheats, or auto-fire (unless the game natively allows it).

Gentlemen’s agreement: the use of glitches that artificially inflate the score is also forbidden.

🎁 Rewards and fair play

The challenge is above all about discovering games, sharing tips, and of course having fun, all in a competitive spirit that’s always welcome!

The winner will receive a game key (GOG, Steam, etc.) chosen from a list of around 100 titles.
If you have won a challenge in the past three months, the prize will go to the next player.

Your ranking will be added to the One Credit Challenge leaderboard.
The champion of the first season will win either a free RGB Dual 2 or a one-year subscription to Recalbox Patreon.

Good luck to everyone, and may the best score win!