The Binding of Isaac achievements
2,209
(990)

The Binding of Isaac

4.0 from 144 votes

There are a maximum of 99 The Binding of Isaac achievements (52 without DLC) worth 2,209

3,536 tracked gamers have this game, 116 have completed it (3.28%)

Wrath of the Lamb
1,221

1,175 tracked gamers have this dlc pack, 126 have completed it (10.72%)

There are a maximum of 47 achievements worth 1,221

There are no reviews

Achievement Details

Secret Achievement in The Binding of Isaac

Secret Achievement19

Continue playing to unlock this secret achievement. (Secret)

  • Unlocked by 574 tracked gamers (49% - TSA Ratio = 1.88) 1,175  

Achievement Guide for Guppys Hairball

AuthorSolution
ClownTastic08
7,466
ClownTastic08
Achievement won on 20 Oct 15
TSA Score for this game: 2,209
Posted on 31 October 15 at 20:26, Edited on 31 October 15 at 20:36
This solution has 0 positive votes and 0 negative votes. Please log in to vote.
To unlock Guppy's Hairball you must transform your character into Guppy during one of your playthroughs. To achieve this you must collect three separate Guppy items over the course of your run. Items that count towards this are

Guppy's Tail
Guppy's Head
Guppy's Paw
Dead Cat

Guppy items are primarily gained from either Deals with the Devil rooms or from Red Chests found through the floors at random or in Curse Rooms.

Deals with the Devil are triggered randomly on each floor but there are ways to further your chances of one turning up, the best and simplest way is to make sure you do not take and Red Heart damage during a floor or during the boss fight, to help ensure this happens Spirit Hearts help greatly as losing HP via Spirit Hearts does not affect your Devil Room chances.

You do not have to be holding all three items at once for the transformation to take effect, so long as you have picked up three of the necessary items over the course of your run you will become Guppy.
Please log in to comment on this solution.
Do you have a question about this achievement? Please post it in the The Binding of Isaac Forum