Binding of Isaac Achievement: Plan C
In-Game Secret Number
Acquire both key pieces
Defeat Isaac as The Forgotten
Alt stage to the basement.
Defeat Mom's Heart 11 times
Defeat Ultra Greed as The Forgotten
Pick up two technology items in one run
Have 20 blue flies at the same time
Defeat Ultra Greedier as ???
Spawn three charmed enemies in the same room
Collect every entry in the Bestiary (Bugged v190 - Mobs that don't exist in the bestiary are being counted. This allows Sin Collector to be unlocked without a complete bestiary)
Defeat Delirium as Keeper
Sleep in 10 beds
Pick up any 3 of the following items/trinkets in a single run: 9 Volt, The Battery, Car Battery, AAA Battery, Watch Battery
Beat Chapter 4 without taking damage
Unlocked a new co-player baby.
Defeat Delirium as ???
Obtain 50 items on a run (e.g., via two Steam Sales and Restock - Duplicate passives/familiars count towards the total, e.g., multiple Breakfasts)
Beat Chapter 3 without taking damage
Unlocked a new area.
Defeat Hush for the 1st time
Defeat Satan as The Forgotten
Defeat Delirium as The Lost