In a nutshell, it’s a completely abstract Roll and Write. Each turn, you roll five dice. You can use the dice to earn a development, score points or take a penalty. And earning a development or scoring points means rolling high (higher than average, actually) The game ends after someone fills in all ten scoring boxes (although every other player gets one more turn)
Developments, by the way, are different ways to manipulate dice. They range from rerolling dice to multiplying the third and fourth highest dice and subtracting the second lowest die. I love dice manipulation and developments are the most interesting part of the game. Unfortunately, other than rerolls, they are a excessively arcane, particularly for such a light game. The idea is great (just look what if it did for Roll Through the Ages) but it feels like it needed a lot more play testing and refinement.
Another issue with the game is that, even for a dice game, the luck factor is high. The game basically punishes anything short of very high rolls, which offsets the decisions that you can make. In fact, I would say that Yahtzee offers a lot more control and ways to offset bad luck. Even a game like Zombie Dice lets you play with odds but GnS has you just hoping you beat the odds.
The game was released in 2008, before Roll and Writes really started picking up steam as a genre. Roll and Write games have gone through a lot of development so I feel like I’m judging a game that was developed before a crucial crunch point. Still, I wonder what I would have thought of it in 2008. At the same time, I had almost no interest in Roll and Writes in 2008.
Ultimately, Goko no Saikoro has some interesting ideas but fails to pull them off.