The achievement descriptions are clear enough without any guides. This guide describes the fastest ways to get achievements, through various bugs, abuses, shortcuts and speedrun strategies. The guide skips the 3 intermediate achievements that you get by completing another achievement. All playthroughs are on an easy difficulty level.
Most difficult achievements:
1. Complete all campaigns;
2. Collect a lobby of 7 players and defeat them all.
Campaigns
Complete the first 5 missions.
- Mission 02: Construct a granary outside the castle. Destroy the wall and the gate. And surround the castle with a wooden wall to trigger the script for the building mission.
- Mission 03: Build woodcutters next to a group of wolves. The woodcutters will kill half of the wolves and kill the other half with the lord.
- Mission 04 & 05: Use only archers. Surround the Signpost with walls and place archers on the walls. The Rat’s troops will stand still for a couple of seconds before the assault begins.
Taking a Stand
Complete missions 6-11.
- Mission 06: Do not build anything with stone, it will trigger the Rat’s catapults. Build a citadel, put archers there and defend from the citadel. Rat’s Engineers and Ladderman will not attack you.
- Mission 08: Use only archers. Surround the Signpost with walls and place archers on the walls. The Rat’s troops will stand still for a couple of seconds before the assault begins.
Fighting Alone
Complete missions 12-15.
- Mission 12: Blow up the wall with sappers and kill everyone with infantry. After gaining control of the castle, destroy all the walls and sell the stone.
- Mission 13: Build a wall on the mountain and from it lead a ladder down. Collect 20-40 macemens and just run into the Snake Castle. Use the positive fear factor to increase the damage resistance of your units.
For King & Country
Complete missions 16-21.
You need to complete all 10 missions. The missions represent the usual Siege mode. In defensive missions, the tactics are the same and are not particularly difficult. Get the entire army to the central castle.
1. Dunnottar – defense.
2. Warkworth – siege.
Wait for all enemy macemens to leave, then start moving your army along the right side of the map. Use the trebuchet to destroy the tower and breach the wall to the castle.
3. Pembroke – siege.
Immediately slow game speed and divide units into groups. Have each group destroy walls and barracks. Trigger the boiling oil with knights.
4. Warwick – defense.
5. Bodiam – defense.
Move all units from the far walls to near the castle.
6. Hastings – siege.
Set up a trebuchet at the rocks on the shore and destroy the tower. Dismiss the engineers from the trebuchet and build a catapult. Use the catapult to destroy the wall and wooden gate.
7. Chatetau Gaillard – siege.
Wait until all the macement are out of the castle, then start the assault. Engineers build portable shields and unite them in one group with shooting units. The shooting units will cover the others. There are enough units to assault the castle directly without any tactics.
8. Chateau de Coucy – defense.
All units from the far walls, put them in the central castle.
9. Marksburg – siege.
Destroy the first line of the wall with catapults. Divide all units into small groups. After the wall is opened, go around the castle and destroy the barracks. In small groups, give the same orders so that units do not crowd and do not trigger boiling oil.
10. Heuneburg – defense.
Game modes
Selecting the “Gluecksburg” map. Allocate ABSOLUTELY all points to pikemen. Order 10-20 pikemen to attack the barbican, these 10-20 soldiers must trigger all oil ditches. The remaining pikemen are split into three groups. Give orders to all three groups to destroy the gate. After destroying the gate, enter the castle. The more separate groups you have, the more damage you will do. Only one unit from a group can stand on each tile. Stack multiple units from different groups in the same tile so that your army fights in a compression of multiple soldiers.
Immovable Object
Set an easy difficulty level, choose any small castle. The smaller the castle, the faster the siege.
You can start the tutorial from the main menu -> bottom right corner -> book icon.
Master Cartographer
Create a map for any of the four modes:
- Siege;
- Invasion;
- Economic missions;
- Free build.
From the menu, select upload map to workshop, fill in all fields in the window that opens.
A Gaggle of Gregs
By completing this achievement you will also get the “Time to Die, Greg!” achievement. To get this achievement, you must make a lobby of 7 more players. Choose the smallest map with 8 players and be the only survivor. You do not have to kill all opponents. It is enough that the opponents kill each other and the last one is killed by you. You can team up in teams. Make a lobby of 8 players, split into teams and give the victory to one group first, then to the other. All players on the winning team will get both achievements. Be sure to start the game with 8 players in the lobby. If a player leaves the game, he will be defeated. It is not necessary for all players to be in the lobby for the end of the game. It is enough to gather the lobby, divide into teams, and then one of the teams must leave the game.
The Conqueror
Create a map for the “invasion” mode. Build 2 castles on the map – your own and any other color. Spawn a couple of units for you.
- Then click “Scenario Editor” in the upper right corner.
- In the window that opens, on the bottom right, click “New Event”. Then “Edit Condition.”
- In the list that appears, select “Enemy lord killed”, select “Any” on the left hand side.
Save the map in the editor and load it in Invasion mode on very hard difficulty. Kill the enemy lord with the units you have spawned for yourself.
The Economist
Create a map for the “Economy” mode. Build your castle and a couple of large cathedrals. Similar to the previous achievement in the “scenario edit”, select “Gold Acquired” and set the minimum value. Save the map in the editor and load it in Economy mode on very hard difficulty.
Miscellaneous
Create a custom map with 300 soldiers. Load this map into Invasion or Economy mode and dismiss all 300 soldiers.
Smaug
Easiest to do in “free build” mode. Use the negative fear factor to make workers move faster and bring more resources.
Make it Through the Winter
Easiest to do in “free build” mode. Use the negative fear factor to make workers move faster and bring more resources. You need to exactly get resources, not buy them and not necessarily store them.
The Barmy Armory
Easiest to do in “free build” mode. Use the negative fear factor to make workers move faster and bring more resources. You need to exactly get resources, not buy them and not necessarily store them.
Still Need More?
Easiest to do in “free build” mode. Use the negative fear factor to make workers move faster and bring more resources. You need to exactly get resources, not buy them and not necessarily store them.
Thanks to シ for his great guide; all credit to his effort. You can also read the original guide from Steam Community. Enjoy the game.