Sons of the Forrest play through guide:

1: Land in Heli Copter (Spawn locations vary)

2: Collect Flashlight and Modern Axe (GPS Marker the most South East of the Three)

Optional 1: Collect Knight V Bike (Winter Jacket nearby)
(Spawns in Camps west middle of the mountain)

Optional 2: Collect Pistol / Rail (Rail on the West Coast near GPS)
(West Most GPS Marker in the water)

3: Collect Rope Gun (Cross) (Stun Baton near) & Rebreather in Caves (Stun Gun)
(North Cave is Rebreather "Easier Cave") (In the Forrest farthest South West Cave of mountain Peek "Challenging Early on")

4: Collect Shovel in Cave (Pistol Flashlight) (Both Other caves needed first)
(West of mountain next to West Main river from Peek)

5: Collect Key Card from Maintenance Bunker A (Fire Axe) (Laser Sight)
(North West side of the mountain but south of Rebreather cave. You will have a GPS dot if laptop data was collected) (Shovel Needed)

6: Collect Shotgun from GPS Grave
(North West GPS Marker) (Shovel Needed)

7: Compete Entertainment Bunker (Chainsaw) (Pajamas) (Guitar) (3D Printer)
(GPS Marker from laptop data, off a river delta directly West from Shovel Cave) (Maintenance Key needed, Will collect a Guest Key card)

8: Complete Food and Dining Bunker (Collect Crossbow) (Shotgun Rail)
(GPS Marker from laptop data directly North from Entertainment Bunker in a field) (Recommended second due to Weapon upgrades collected from prior listed events)

Optional 1: Go to Maintenance Bunker B (Pistol Silencer) (Compound Bow)
(GPS Marker from laptop data, South West of mountain, directly West from South most West cave) (Shovel Needed)

Optional 2: Go to Maintenance Bunker C (Revolver)
(GPS Marker from laptop data, North East of Mountain in the middle of Nothing special)

Optional 3: Complete Cave F (Pick Axe) (Item Plating Blueprint)
(South of Maintenance Bunker C, East of Mountains)

Optional 4: Complete Residential Bunker (Katana) (Putter) (Pistol Flashlight) (Pistol) (Space Suit "Best Suit") (Gold Mask)
(GPS Marker from laptop data, South East of Mountains, East Side of Big Lake)

9: Complete Cave D "Lake Cave" on Right Side of Map (Rifle) (Golden Armor) (NVG's "I didn't find them") Get spit back out on Left side of the Map
(Directly East of the mountain on edge of Big Lake. NOT ACCESSIBLE FROM WEST SIDE OF MOUNTAIN. You can swim in the Cave on East side to get a Artifact but blocked further progress by slip and slide)

LAST 10: Complete Luxury Bunker (Nothing here...) Golden Armor NEEDED. Entrance to Hell Cave E
(Last part/ Cave in the Game North East of the mountains near the East Coast)
Part 1: Head to Bunker (Last save location in a Bed)
Part 2: Open Golden Door wearing Golden Armor
Part 3: Fight Demons (Cross is Highly Effective)
Part 4: Fight Boss Demon (Tough but kill-able, use heavy ammo)
Part 5: Fight Final Boss (THROW EVERYTHING AT IT not hard but Explosives Necessary)

Choice: Stay (Pick Up Backpack) or Leave... (Join Timmy on Heli)

The END.

I hope this helps someone, like me who was trying to figure out the game and wanted a quick guide not to get lost. You can complete the game in only a few hours with this method all before Winter in the game around Day 10. Let me know if anything needs updating and thank you for reading!!

Thank you
Jannawaber