Here is the full list of all 26 Injection π23 'No Name, No Number' achievements.
ENTER_NIGHTMARE
ELITE_SILVER
ELITE_GOLD
SURVIVOR
NIGHT_WALKER
BE_CURSED
BACK2SCHOOL
MENTAL_CAGE
CROSS_TREES
SELF_DEATH
BLACK_CUBE
INVINCIBLE
NO_HARD_FEELINGS
KNOW_TO_HELP
CICADA
AVID_READER
COLLECTOR
SKETCHES
DEMONS
SPECIAL_EAR
MEMORIES
PEACEFUL