Optimizing and predicting RNG

riklaunim

Sodbuster
Each playthrough has a seed value that is then used to generate results for things like geodes, weather patterns, possible night events, and so on. This can be checked with https://mouseypounds.github.io/stardew-predictor/ - but the RNG in this game isn't just a dice roll. You want something specific from for example Artifact Trove - technically you have 3,6% to get one specific thing, but all geodes are on the same counter so if you are opening various geodes you may not get what you want that quickly...

It's possible to force some favorable RNG by using a different seed - either starting a new playthrough over and over while checking each with Stardew Predictor or getting known lucky seed value from other players. This can be used to get:

- early prismatic shard from an omni-geode
- "easy" treasure appraisal guide
- red cabbage from the traveling cart (also has a first-year completion guarantee toggle in the game settings)
- early quality sprinklers from traveling cart (up to 5 at once but it's super rare to get 5 during the first half of spring for example)
- early coconut/fruit salad/pink cake/sunflower to gift Haley on her birthday to then have enough hearts with her to dance with her at your first flower dance ;)
- early iridium bar to build a slime hutch before farming the mines for some chances on slime eggs for extra profit (low chances but still)
- focusing on more trains / more rainy days.
- getting late community center items early

Mystery Boxes can also give a prismatic shard but they are more complicated than geodes - first, you need enough "help wanted" quests to spawn (those that you can complete) to unlock them to then start gathering them. If you get fortunate and unlock them before strawberries for example and you get first 1-few you may check for speed grows or other handy things. Prismatic shard at like 40-50 mystery boxes may actually be quite far away depending on your "luck".

Getting Book of Mysteries helps with getting mystery boxes but to get it (from mystery boxes) you also have to check the counter at which the book will show up. If you are lucky it will be like the first 20-40 which is doable, but if it's way further you may unlock master boxes before you get enough normal boxes :D

shard.png


From checking multiple "new games" prismatic shards rarely show up on counters lower than 100-200 and sometimes show up at much higher counter values... yet rarely you can get a seed that gives a prismatic shard within first 50 or less geodes. This in theory allows getting a prismatic shard in spring, then investing in the bus unlock to get a nice sword before even getting deep into the mines.

Night events like meteors or fairies have a chance to occur on the marked date - they aren't guaranteed. A witch event can happen if you have a big/deluxe coop or a slime hutch.

Prize ticket rewards are also in this system - will you get quality sprinklers or maybe more interesting jars or mushroom logs? ;)

For Mines the calendar gives info on mushroom floors (income!) and infested floors - handy when farming eradication goals.

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Gifts sent by villagers to you in the mail are a choice from a pool of items given NPC can give and will re-roll if you re-load the save.

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And if you wonder what forge items spawned on your current day - https://stardew.selbysaurus.me/calendar (also finds NPCs).

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And there are more advanced prediction apps, which on older versions of the game allowed players to get near-infinite rainy days (as it depended on farmer movements the day before) while now allowing optimal hoe usage (clay farming is gone by default in 1.6 though, although there is a checkbox to use the old RNG systems with clay farming).


Any other RNG optimization/option I forgot? :)
 
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