"An achievement that empowers those who earn it. The flavor is like a dream... a powerful personal experience, yet difficult to describe to others."

Overview

In terms of missable achievements, Stardew Valley does not have any. It does; however, contain two mutually exclusive achievements. For more information regarding this please see the permanent choices labeled: "Community Center vs Joja Mart". This can either be handled by backing up a save, and performing both achievements on the same save or by using two completely different playthroughs.

Permanent Choices

Farm Type

With Update 1.1 and after, the first permanent choice the player faces is deciding what type of farm they wish to play on.

If this is your first time playing Stardew Valley and your intentions is to complete the achievements of the game, I would either recommend the standard farm or the forest farm. If achievements are not a primary factor in playing Stardew Valley, feel free to pick any farm you wish.

A simple plot of land, with a large amount of open space to design your farm.

Skills

In total, there are 5 different skills. For each skill, you are given a route at level 5. Then at level 10, you are given another route based on the route you took at level 5 for each skill. This is merely a warning that the choices you take will adversely affect you future choices. So when the time comes, or now, to check the skill section and determine your routes. My preferences are given below:

Farming: Tiller to Artisan (Helps with money making 'Legend' achievement)
Foraging: Gatherer to Tracker (Helps with artifact for 'Complete Collection' achievement)
Mining: Geologist to Excavator (Helps with artifact for 'Complete Collection' achievement)
Fishing: Fisher to Pirate (Helps with artifact for 'Complete Collection' achievement)
Combat: Fighter to Brute (Personal Preference)

Farming and Combat can be worked around; however, foraging and fishing are highly recommended that you keep them as they are. Artifacts are time consuming to come by, so getting all the help you can get is recommended. Mining on the other hand has ties to minerals with geodes which is recommended, but less so. Geode minerals are less rare than artifacts; however, this still remains a recommendation.

Farm Cave

In order for Demetrius to show up to your farm and present you with the option to do something about the farm cave, the player must earn a cumulative total of 25,000g in earnings. After that, you'll have Demetrius show up to your farm and ask to setup the Farm Cave giving you the option between Fruit Bats or Mushrooms. This choice is permanent so you need to determine which of these you would prefer.

Early game, the fruit bats would prove more useful as growing fruits and purchasing saplings for fruit trees is expensive; however, once you have fruit trees established, the fruits that appear in the cave become less appealing. Mushrooms would take longer to produce as well as the fact that the Secret Woods contains most of these. Now, if you were to select the Forest Farm as your farm, then I would select the Fruit Bats. If you do not have the Forest Farm and want the long term choice, I would pick the Mushrooms.

Note: Both options will grow their respective products out of season.

Community Center vs Joja Mart

The 'Local Legend' and 'Joja Co. Member of the Year' achievements are mutually exclusive. This means that in one save file, you can only do one or the other and not both. Now, backing up a save near the end before you obtain either one of these achievements is a viable method to obtaining both achievements with the same playthrough, but not the same file.
Update 1.1 has made it so that these two achievements are not missable. You will end up with one or the other regardless of how many paths you mix on the way to restoring the town. The achievement that you end up with will depend on which side you complete the final upgrade with.

Each upgrade in the Community Center correspond to each upgrade in the Joja Co. Membership Card.

Community Center

To begin the restoration of the Community Center, simply enter the town between 8AM and 1PM on a sunny day after Spring 5 and you will get a cutscene with Lewis. Here you will also encounter Junimos and in a language you can't read will initiate a quest given to you by the Wizard. This quest will grant you access to the Wizard's Tower as well as the ability to communicate the Junimos.

After that, you can begin with dealing with the bundles. Bundles require you to take certain items, and in some instances quality, and turn them into the community center. This will consume the items. For each bundle the player completes, the player will receive a specific reward and may also receive friendship points with various villagers. If the player completes all of the bundles in one room, then the player will receive a Pelican Town restoration development.
This is considered the "good route".

Joja Mart

To begin the Joja Mart takeover, simply buy the Joja Membership for 5000g from Morris in Joja Mart. Purchasing the membership will replace the Community Center with a Joja Warehouse. After that, simply talk to Morris to purchase Pelican Town developments. It would cost 135,000g to buy all the upgrades.

This is considered the "bad route".

Side Note: While you can start the Community Center route, it is possible to switch to the Joja Mart route before you complete all of the bundles and purchase the Membership. This will save money. However, this only works in that way. Purchasing the membership will effectively close the Community Center and replace it with the Joja Warehouse.

Spring

Events

Strawberry Seeds

Event: Egg Festival - Spring 13
Location: Pierre's Booth for 100g per seed.

Tub O Flower Recipe

Event: Flower Dance - Spring 24
Location: Pierre's Booth for 2,000g.

Farming

Crops

Parsnip

Seeds: Sold at Pierre's General Store and Joja Mart
Growth: 4 Days

Potato

Seeds: Sold at Pierre's General Store and Joja Mart
Growth: 6 Days Note: 1-2 Harvest

Kale

Seeds: Sold at Pierre's General Store and Joja Mart
Growth: 6 Days

Cauliflower

Seeds: Sold at Pierre's General Store and Joja Mart
Growth: 12 Days

Green Bean

Seeds: Sold at Pierre's General Store and Joja Mart
Growth: 10 Days Note: Regrows in 3 Days and Grows on Trellis

Rhubarb

Seeds: Sold at the Oasis in the Desert (See Location: Bus Stop)
Growth: 13 Days

Garlic

Seeds: Year 2 - Sold at Pierre's General Store and Joja Mart
Growth: 4 Days

Coffee Bean

Seeds: Seeds sold by Traveling Cart
Growth: 10 Days

Strawberry

Seeds: Sold during Egg Festival Event on Spring 13
Growth: 8 Days Note: Regrows in 4 Days

Fruits

Apricot

Seeds: Sold at Pierre's General Store and Joja Mart
Growth: Tree grows in 28 Days | Produces 1 Fruit a Day in Season

Cherry

Seeds: Sold at Pierre's General Store and Joja Mart
Growth: Tree grows in 28 Days | Produces 1 Fruit a Day in Season

Flowers

Blue Jazz

Seeds: Sold at Pierre's General Store and Joja Mart
Growth: 7 Days

Tulip

Seeds: Sold at Pierre's General Store and Joja Mart
Growth: 6 Days

Foraging

Wild Horseradish

Location: Everywhere

Daffodil

Location: Everywhere

Leek

Location: Everywhere

Dandelion

Location: Everywhere

Spring Onion

Location: Cindersap Forest (Just north of the Sewer Entrance)

Common Mushroom

Location: Secret Woods (See Location: Secret Woods)

Morel

Location: Secret Woods (See Location: Secret Woods)

Salmonberry

Location: Everywhere

Fishing

Anchovy

Location: Ocean Other Seasons: Fall
Weather: Any Time: Any

Sardine

Location: Ocean Other Seasons: Fall | Winter
Weather: Any Time: 6AM-7PM

Herring

Location: Ocean Other Seasons: Winter
Weather: Any Time: Any

Eel

Location: Ocean Other Seasons: Fall
Weather: Raining Time: 4PM-2AM

Halibut

Location: Ocean Other Seasons: Summer | Winter
Weather: Any Time: 6AM-11AM | 7PM-2AM

Smallmouth Bass

Location: Rivers Other Seasons: Fall
Weather: Any Time: Any

Sunfish

Location: Rivers Other Seasons: Summer
Weather: Sunny Time: 6AM-7PM

Shad

Location: Rivers Other Seasons: Summer | Fall
Weather: Raining Time: 9AM-2AM

Catfish

Location: Rivers | SwampOther Seasons: Fall
Weather: Raining Time: Any

Legend

Location: The Mountain (Lake) | Raining
Note: Requires Level 10 Fishing | One of a Kind | See Fishing

Summer

Events

No time limited items in Summer Festivals.