RNG manipulation; random number adjustment
Video game term for techniques that influence or predict random number generation to obtain desired outcomes.
I used RNG manipulation to reliably obtain a rare item.
In this game, there are many situations where RNG manipulation is effective.
乱数 means 'random number' itself, while 乱数調整 refers to the act of manipulating or adjusting random number generation.
Compound of 乱数 (random number) and 調整 (adjustment).