also: くそげ
noun
crappy game; terrible video game
Slang used by gamers to describe a game that is poorly made, frustrating, or not fun. Often used in online reviews and discussions.
このゲーム、バグだらけで本当にクソゲーだ。
This game is full of bugs and is a real crappy game.
期待して買ったのに、クソゲーだった。
I bought it with high hopes, but it turned out to be a terrible game.
Compound of 糞 (くそ, 'crap') and ゲー, a clipping of ゲーム ('game'). The long vowel form ゲー is common in slang abbreviations.