Skip to content
9. Crossing the river
Crusader Kings III

9. Crossing the river

Learn how to conquer the Onii kingdom by building essential structures, training new units, and defeating the giant frog boss in this Crusader Kings III walkthrough.

By ··10 min read·Multi-source verified
1 reading this guide  

Learn how to conquer the Onii kingdom by building essential structures, training new units, and defeating the giant frog boss in this Crusader Kings III walkthrough.

Walkthrough
  1. 1
    After waking up, Howser will inform you that it's time for world domination and that the Onii kingdom to the south of the river must be destroyed.
  2. 2
    Check for new buildings: Guard Badge (x3, 600000 Bol) for increased recruitment, Carpenter Hut (1050000 Bol) to train carpenters for building bridges and stairs, and various colored roof houses (130000-400000 Bol) to gain citizens.
  3. 3
    Your first priority is to buy the Guard Badges and build the Carpenter Hut and a Red Roof House.
  4. 4
    Head out of the castle and encounter Kampbell of the Sect of Soup, who requests a church in the graveyard. You can address this later.
  5. 5
    Find two carefree adults and send them to the Carpenter Hut, costing 50000 Bol each to train.
  6. 6
    Use the trained carpenters to build stairs at the hammer sign west of the bridge leading back to your castle.
  7. 7
    Climb the stairs to find a hole and a crack. Dig open the hole for a gold bar and use a farmer to open the crack, revealing another gold bar.
  8. 8
    Enter the former cemetery grounds, head southwest to a narrow path, and find a crack. Open it and dig up another gold bar. This treasure totals 900000 Bol.
  9. 9
    Talk to Howser to unlock the Soup Church (44000 Bol) in Castle Town. Build it and consider building two more houses to increase population.
  10. 10
    A new special object, the Podium Placement (500000 Bol), is available to gather forces, but can be postponed.
  11. 11
    Check the suggestion box for the "Giant frog rumor" quest.
  12. 12
    Head out of the castle, turn two carefree adults into soldiers, one into a farmer, and one into a carpenter.
  13. 13
    Assemble a team of 6 soldiers and 2 farmers.
  14. 14
    Head southwest to a wooden barrier next to a watch tower and smash through it to enter Upchuck Forest.
  15. 15
    Before entering the field, send your farmers to dig up two holes near traffic cones to collect goodies.
  16. 16
    A giant frog will emerge from the lake.
  17. 17
    Boss Fight - Giant Frog:
  18. 18
    The frog attacks by leaping, creating shockwaves, and spitting poisonous purple slime.
  19. 19
    Its most dangerous attack is sticking out its tongue to instantly devour a soldier.
  20. 20
    If troops are stunned by shockwaves, press B repeatedly to recall them.
  21. 21
    Attack the frog when it has just spat slime or landed after a leap.
  22. 22
    Send several soldiers onto its back, avoiding its front to prevent them from being devoured.
  23. 23
    Only up to 3 soldiers can attack the frog's back at once.
  24. 24
    Poison only drops health to 1 HP, and the frog can be defeated with patience.
  25. 25
    After defeating the frog, you will be rewarded with 3000000 Bol. You will be charged 10000 Bol for each soldier lost in battle.
  26. 26
    Defeated soldiers can be found washed up on the shore on Over There Beach.
  27. 27
    Talk to Howser to see new building plans in the Grassland Town district, including the Hunter Hut (4500000 Bol) to train Animal Hunters.
Tips
  • Prioritize building the Carpenter Hut and a Red Roof House early on.
  • Train carpenters to build stairs to access hidden areas and treasure.
  • Dig up all available treasures before triggering the Giant Frog battle.
  • When fighting the Giant Frog, focus attacks on its back and avoid its front.
  • Manage your troops carefully during the frog fight, recalling stunned soldiers to prevent them from being devoured.
  • The poison from the frog's attack is not lethal, only reducing health to 1 HP.
  • 3000000 Bol upon defeating the Giant Frog.
  • Potential cost of 10000 Bol per soldier lost in battle.
  • Access to new areas and potential for kingdom expansion.

100% Human-Written. AI Fact-Checked. Community Verified. Learn how AntMag verifies content