Ten kills
ACH_TEN_KILLS72.8%

Achievements and their recorded unlock rates.
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ACH_TEN_KILLSACH_YOU_DIEDACH_YES_WE_CANACH_PlayFor2hStraightACH_3DaysACH_100_KILLSACH_7DaysACH_LEAD_THE_WAYACH_14DaysACH_500_KILLSACH_1k_KILLSACH_30DaysACH_EatBaitACH_50DaysACH_5k_KILLSACH_100DaysACH_3DaysNightmareACH_7DaysNightmareACH_10k_KILLSACH_20FishACH_FortunateSonACH_100FishACH_50Fish