Depths Of Horror: Mushroom Day how to beat the game comes down to a very specific route: grab the shed key, survive the cave fall, stay on the correct edge paths, slow down only when spiders force you to, and save before the mine achievement section so you can safely trigger it.
The key points are simple: stand to the side before opening the shed door, take the flashlight after the fall, follow the left/right turns exactly as the route demands, and stop running any time a spider is above or behind a rock. The mine section also has a safe achievement setup if you reach the save point first.
Surface: Reach the shed and open it safely
Once you’ve eaten enough little mushrooms, head straight ahead until you find the shed.
When you reach it, pick up the stone and take the key using F or E. Then move to the door and stand to the side before opening it.
Stand off to the side, then open the door.
The gunshot is part of the sequence, but you survive. Go inside, step on the mushrooms, and you’ll drop into the cave.
Cave route: flashlight, forks, spiderwebs, and the first cliff
After the fall, grab the flashlight behind you right away.
You can run with Shift, and you should use it for the open stretches that follow.
Keep moving forward and curve through the passage as shown.
At the pumpkin and fork, take the left path.
Remove the spiderweb.
If you spot a larva, slow down and avoid the floor hole. Go around it on the left. If you fall in, you can backtrack to the pumpkin.
Next comes the cliff with yellow water. Stay along the right edge.
At the next fork, go left and keep holding Shift.
Run until you drop off the cliff and land near the bones. The spider should stop here, though the trigger can feel a little finicky.
After the fall: cocoons, pickaxe, and the quiet spider section
After the fall, continue forward and go around the next cliff on the right.
Remove the spiderwebs as they appear.
You’ll enter a room with hanging cocoons. They are not dangerous on their own, but don’t rush through the area.
Go all the way to the blocked passage, then turn around and pick up the pickaxe.
Keep going after that and you’ll fall again.
Save point timing and the spider overhead
Once you land, keep running until you reach the glowing stone, then release Shift. A spider is above, so this is one of the places where you need to move quietly.
Go under it without running.
Afterward, another spiderweb appears. Don’t touch it. Take the left route around the cliff instead.
Go around carefully.
Next is another cocoon area. Do not run here either; there’s a spider behind the rock, so keep to the safe path and circle around it.
Keep moving carefully.
Then you’ll reach a cliff. Jump across, but be ready: mines are coming.
Spider-heavy section, mines, and the bomb achievement
If you hit a mine, don’t panic. The achievement can still be handled later, after you save.
Work around the hazard like this.
Then continue like this.
And like this.
Head right a little farther until you see the save point. Once the save icon appears, turn back and trigger the mine for the achievement.
This is the safest way to handle the Mushroom Day spiderweb how to remove and mine timing problem at the same time: finish the route to the save first, then come back for the achievement if needed.
Three holes in the floor
After that, you’ll reach three holes in the floor. Take the rightmost hole and go down.
Keep moving through the spider tunnels
Remove the spiderweb.
You’ll come into a cocoon area with three spiders on the ceiling. Walk quietly until you pass them, then you can run again.
A stone ahead means another cliff is coming, so slow down and prepare to route around it.
The next cliff has a lot of spiders below. Stay quiet, go around the danger zone, and when the path blocks off, start digging.
Mine segment route
The mine section is a long run, but the route is still readable if you watch for the markers.
You’ll enter the mines and need to keep moving for a while.
When you see the pumpkin, that signals three mine zones ahead. Dodge them carefully.
Descend into the second mine.
Escape: where the key is and how to finish
Before the final escape, remember where the key is located so you do not waste time once the run starts.
Run immediately.
When you reach the structure, go around it as shown. Look for the crate cluster, then focus on the far crate — the key is there.
Pick up the key with E or F, then run for the stairs.
At the ladder, press E or F to finish the escape.
For the full Depths Of Horror: Mushroom Day walkthrough, the main rule is to keep the pace aggressive in open tunnels and cautious anywhere spiders, cocoons, webbing, or mine markers force a slowdown.