Here is the full list of all 15 Halloween Pumpkin Story achievements.
NEW_ACHIEVEMENT_HPS_DESC_1_0
NEW_ACHIEVEMENT_key_DESC_1_1
NEW_ACHIEVEMENT_ext_DESC_1_4
NEW_ACHIEVEMENT_th_DESC_1_5
NEW_ACHIEVEMENT_saw_DESC_1_6
NEW_ACHIEVEMENT_cogwheel_DESC_1_7
NEW_ACHIEVEMENT_e_DESC_1_8
NEW_ACHIEVEMENT_one_DESC_1_9
NEW_ACHIEVEMENT_ice_DESC_1_10
NEW_ACHIEVEMENT_s_DESC_1_11
NEW_ACHIEVEMENT_sm_DESC_1_12
NEW_ACHIEVEMENT_di_DESC_1_13
NEW_ACHIEVEMENT_elk_DESC_1_14
NEW_ACHIEVEMENT_witch_DESC_1_15
NEW_ACHIEVEMENT_37_1_16