For those wanting the Oh Shoo, O'Shah achievement in Have a Nice Death, here is the complete compendium of curses, along with several tips at the end to help you get the achievement faster.

The Oh Shoo, O'Shah achievement involves getting all 314 curses, including 88 red curses, 78 blue curses, 69 green curses, and 79 curse penalties. You only have to get each curse once to progress the achievement.

This achievement takes many hours and many runs to get, and is not easy, even with a guide, so prepare to spend a lot of time on this one.

Here are some tips & tricks to getting all of these curses

1. max out your level first

If you are trying to get this achievement before being level 19 or 20, I would recommend doing the breakdowns in the meantime to level up first. Some curses cannot be unlocked until later levels, including stuck-effect curses, which only unlock after reaching level 19. Level 20 has an even greater boost, giving you five curse re-rolls to start. As such, you should max out your level first.

2. Play on breakdown 10

If you are struggling to get penalties, play on breakdown 10. The more penalties from breakdown 6 and the penalties in twos from breakdown 10 will combine to give you plenty of penalties in every run. Once you have all of the penalties unlocked, I would recommend playing on impending breakdown difficulty, or even self-fulfilment difficulty, as some curses are really hard to play with.

3. Getting specific penalties

Most penalties are available everywhere, but some are unique to department enemies. These penalties can be gotten in either the same department or the previous department (example: you can get a industrial pollution penalty in the hall of eternity). Hall of eternity penalties may be hard to come by, so if you need specifically hall of eternity penalties, I recommend playing on breakdown 10, checking the tree beforehand to see if there is a tier 2 curse with a penalty, getting the first curse in the first room, and then defeating the thanager and getting the second curse. You should find some hall of eternity penalties.

4. Choose an infuse curse if you see one

Some curses need a prerequisite curse in order to appear. these mostly need infuse curses, so if you see a curse with infuse in it, grab it.
The infuse curses that unlock other curses include the following:

• Bleed
  
• Poison
  
• Frozen
  
• Burn (and pyre)
  
• Lightning
  
• Deadly Butterflies
  
• 50% Lifesteal

note that pyre, which makes enemies explode, is a secondary prerequisite for drowned fire.

5. Focus a curse

Pick a curse from the list above that you don't have yet (the slot is empty) and try to aim for it. If it needs a prerequisite curse, look for the previous curse first. This really helps when you combine it with the next tip.

6. Stack curse re-rolls

Try not to spend any of your curse re-rolls until later game, around late modern warfare/natural disasters department. Then, spend them all on a specific area where a curse you may not have yet could appear (example: if you are missing a level 5 blue curse, re-roll the fifth from the bottom in the blue tree). If you need a prerequisite curse first, try to get a run with the prerequisite as the first curse. Prerequisite curses besides deadly butterflies and lifesteal are level 1. use your five re-rolls, you can start over immediately for a new seed if you don't find it

7. Be aware of department bonuses

Every department except hall of eternity gives a bonus for a select colour of curse. This causes all gray rarity curses to be removed from the mix. If you are going for a gray rarity curse, make sure you are not in a department with a corresponding bonus. Otherwise, being in a bonus department is a great help as it removes several curse opportunities.

8. Keep your tree open

One thing that is valuable to do when collecting curses is choose them based on their location in the curse tree (unless it is a new curse). Try to get curses that will unlock new spots in the tree, and avoid those that don't. If you have many curse options at the same time, it is more likely that you will find a new curse. If you see a very important curse that will help you with your run, but it will not unlock any new curses, then it is worth getting it anyways to ensure you can finish your run.

9. Green checkmark (new to 1.0.1)

As of 1.0.1, Each curse has a small green checkmark in the bottom right corner. It lights up green if you already have the curse, and is barely noticeable if you don't.
Example:


If you see a non-checked curse, it means that you don't have it. This is extremely helpful for finding new curses and getting the achievement.

Overall, this is a very difficult achievement, but having this guide will make it many times easier as you will know what curses you are missing. Hopefully, this guide will help you get the Oh Shoo, O'Shah achievement.