Monster Harvest has a very easy-going path to 100% with no missables as it has no achievements focused on collecting all types of crops, fish, cooked dish, final house upgrades etc. that you might find in similar games. Most of these mechanics can be ignored completely as a result.

Only one achievement (So long, Slime Co!) takes a while to get as it involves a lot of soil levelling and successful duels.

Welcome to Planimal Point!
Begin your first day on the farm.


My first Planimal!
Recieve a Planimal from the Professor.


Advance to Day 5 and help the professor in the foraging area north of your farm.

To the Rec Center!
Repair the bridge to the rec center.


On Day 14, the eastern area from the town will open up with a cut-scene. This path leads to the Rec Center which is open on Fridays for monster duels with the townsfolk.

Save the Slimes!
Defeat the queen.


Progress to the Level 5 chest room in the dungeon. As a general rule, you should ideally have monsters equal to or higher than the floor enemies here and carry some health potions along the way. Using the mega forms with multi-bite skill helps a lot.

So long, Slime Co!
Defeat Rigley.


Once you have fought all three NPCs in the Rec Center six times, you will have three ribbons (check the monster page) and the final black ribbon is awarded after this fight. Losing or skipping fights on Fridays does not matter but you will need to accumulate six wins.

This duel will happen on the next Friday you go to the Rec Center - assuming you have cleared all five levels of the dungeon too.

Try and sacrifice as many monsters into hearts and level up the soil for your entire monster party as much as possible for an easier time.

Red Slime Time
Apply red slime to a crop.


The earliest you can get this in Day 2 given by the professor, apply the red slime to any planted crop.

Green Sheen
Apply green slime to a crop.


Blue Goo
Apply blue slime to a crop.


Similar to the red slime, just apply these to crops when you get them. Either as drops or from the Slime seller.


Let's Get Fishy!
Unlock the fishing rod.


The south-western exit from town can be cleared up for $1500, this unlocks the beach-side area where you can obtain your first fishing rod.

Furniture in the Forest!
Unlock the furniture shop.


The south-eastern exit from town leads to this forest, also costs $1500 to clear the path. There is a cut-scene that plays sometime in the wet/dark season that advises you to open this path up but it can be done at anytime before that.