Lock
ACH_LOCK3.3%

Achievements and their recorded unlock rates.
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ACH_LOCKACH_FIRSTACH_ZEPPELIN_HUNTERACH_GETTING_SERIOUSACH_SCOUTACH_MASTERACH_ME262ACH_ROCKET_MANACH_MUSTANGACH_ACEACH_MESSERACH_BOMB_DEFUSEACH_TOTAL_50000ACH_SABREACH_PE8ACH_ILACH_SPITFIREACH_FREQUENT_FLYERACH_TOTAL_250000ACH_MINELAYERACH_TOTAL_500000ACH_FREQUENT_FLYER_3ACH_FREQUENT_FLYER_2