Rance X:Walkthrough

Important Deadlines (by the end of Turn)

 * Ruberan and Merim Tser are killed by Babolat = Turn 3
 * Free City falls = Turn 5
 * Alex gets killed = Turn 5
 * Finding Miki = Turn 6
 * Shangri-La = Turn 7
 * Tolstoy dies (Helman 2nd army commander) = Turn 7
 * Saving Hornet = Turn 7 (Turn 8 if on Route A)
 * Papaya and Nelson die = Turn 9 with Medusa still alive
 * Warg > Silky/La Hawzel > Satella get killed (Satella just disabled) = 30% Casualty
 * The Truth of God/Hero's Fulfillment endings = 50% Casualty before Turn 11 depending on Rance's current base.
 * Miki gets killed by Kayblis = End of Turn 14

Route Branches on Turn 8

 * Floating Castle (Route A)
 * None of the countries fall
 * Conquered Shangri-La
 * Win against Red Eye on Turn 8
 * Cliff Fort
 * None of the countries fall
 * Didn't conquer Shangri-La
 * Conquered Shangri-La but lost against Red Eye
 * JAPAN
 * 1 of the countries falls

Floating Castle

 * From the Sea (海から) (Ending A)
 * Choose 'Ship' path during 1st Extermination Mission in Free City. 'Tank' path also works; but requires doing Base Phase mission ランス船団 and picking 2nd choice between Turns 8 and 11.
 * Invade Monster World through sea on Turn 12
 * Be sure to pick the second operation phase quest instead of the first on turn 13.


 * From the Sky (空から) (Ending A)
 * ２つの厄災 quest, pick Toppos route and follow the game


 * Breakthrough (強行突破) (Ending A)
 * Kayblis retrieved Kamilla by not saving Zeth by Turn 5
 * Rescue Hornet
 * 強行突破 Quest on Turn 10 only, you will fight all 2nd Majin if they aren't killed yet


 * Great Invasion of the Monster World (魔物界大侵攻) (Ending A)
 * Invade by the end of Turn 14
 * All 4 countries liberated
 * 1.000.000 troops (100万) across the map (there is a quest that give you 200.000 / phase as soon as you entered this Ending route)
 * Failed to meet these requirements will lead you towards Demon King Kayblis


 * I've defeated the Demon King though (魔王を倒したが) (Ending B)
 * Kill Demon King Kayblis on any route


 * Defeat (敗北) (Ending C)
 * Select the wrong location to invade during "From Sea" route during a turn 13 quest

Cliff Fort

 * The Truth of God (神の真実) (Ending B)
 * 50% casualty


 * Underground Strategy (地底大作戦) (Ending B)
 * Keep playing and do important mission with Poppins and Cream
 * Assuming you do all of the Poppins related missions, the soonest you can achieve this ending is turn 12.

JAPAN

 * Time Capsule (タイムカプセル) (Ending B)
 * Do Siberia (Helman) mission when Kayblis comes to invade on turn 11


 * Demon King Miki (魔王美樹) (Ending B)
 * Intercept Kayblis invasion and kill him.


 * Hero's Fulfillment (勇者の成就) (Ending C)
 * 50% Casualty

Others

 * Demon King from Another World (異界の魔王) (Ending B)
 * Miracle's Operation Mission, Steel Horror


 * The Collapse of Humanity (人類滅亡) (Ending C)
 * 4 countries get annihilated, not doing anything since the beginning of the game
 * You know if you got this if there is no battle with Demon King Kayblis
 * Demon King Kayblis (魔王ケイブリス) (Ending C)
 * Failed to find Miki before the end of Turn 6, or on Turn 15
 * Failed to kill Demon King Kayblis

How to Unlock Part 2

 * Rescue Hornet
 * Liberate all countries
 * Defeat Kayblis on any Ending A
 * Go to Soul Administration through Poppins Tunnel mission
 * Don't let Crook use her pope wish by getting Wenlina by the time Arios come to kill you (Turn 8 at the earliest)
 * How to get Wenlina: Do Base Mission about 4 Holy Gal Monsters (might not needed *unconfirmed*) and do Preparation Mission on Leazas about finding Holy Gal Monster (NOT Chaos mission)
 * You can get Wenlina from ??? event in any mission if you are lucky
 * Very important: don't have sex with Wenlina because if you do, Wenlina will lose her power so she can't revive you when you get killed by Arios
 * Can be done through multiple playthrough as long as it ends on an Ending A (unconfirmed)
 * Note: Doing Breakthrough end will net you 3 of the required achievement ( 5 if you did Poppins and Have wenlina/Didn't get Arios'd )

CP (Clear Point) Tips
You get 1 CP everytime you get a different Ending. It is advisable to collect as much CP as possible (at least 2 after your first run) before starting a New Game+ as CP gives you huge bonus.

Bonus that you should prioritize is And "All cards available" for card collection purpose whenever you feel like using it. Generally speaking, the new cards are more likely to be overpowered than useless, but there's still a good degree of luck involved.
 * 1) Two of "New cards get (+5) Star level upon acquiring" since it gives you massive boost to your overall party strength
 * 2) "Army Rank +1". Two of them should be enough since you will naturally increase your Army Rank along the way anyway and the more Army Rank you have, the usefulness will diminish since you will eventually run out of useful bonus to get
 * 3) As much "Battle EXP +50%" bonus as you want
 * 4) Leftover "Army Rank +1" and "Battle EXP +50%"
 * 5) EXP gives you +1 Star level = trash. It's arguably useful for the end game, but you should be leveled up sufficiently by that point anyways.

Make sure to make a save file every Turn (or even better every Phase), so you can reload to any of them and progress to different Endings

Easy Bad Endings to get (see Endings section for detail) And any 1 of Floating Castle/Fort route Endings (2 for JAPAN) if you are doing well enough to see the end of the route
 * The Collapse of Humanity (人類滅亡)
 * Demon King Kayblis (魔王ケイブリス)
 * Hero's Fulfillment (勇者の成就)
 * The Truth of God (神の真実)
 * Defeat (敗北)

Gameplay Tips

 * Don't abandon any country, balance your Operation mission, don't do same country twice in a row.
 * Generally speaking, you want to kill the Dark Lord of the country with the greatest difference between monster and human troops and do the preparation mission for the country with the second greatest difference.
 * Operation mission difficulty from easiest to hardest = Leazas > Helman > Free City > Zeth.
 * Flying can always be debuffed so close ranged characters can attack. If the flying character has an invincibility field, debuffs that do not deal damage will still remove the flying status.
 * Level up as many cards as possible since their levels matter for your party strength. Notable levels include 10, 20, and 40, since those are when cards rank up and have a dramatic increase in stats.
 * All other things being equal, characters with variant cards will increase the overall stats of a faction more than those without whenever they level up.
 * Pay attention to elemental weakness, use cards that give you elemental advantage (it's on your map screen) and do all-out combo attack when the enemy shows elemental weakness for bonus damage
 * If you absolutely need to inflict a status condition or intercept an attack on the first turn of a battle, save scumming works. It does not work if you're trying to make sure a chest's contents are different however.
 * Many timed battles can be cheesed using an assassination character like Katyusha. Again, this can be save scummed.
 * Be sure to always get the 2nd Chaos sword in the preparation missions. The enemy after the general miniboss is never that hard, and in the worst case scenario, you can simply try to tank all of the damage until the turn limit is up.
 * Try to do the finding Miki and Shangri-la missions as soon as possible. The former gets you Kentarou, a very useful unit that can also break invincibility fields, and the latter will make it harder for the other countries to survive the longer you put it off.
 * During the Shangri-La mission make sure to pick the Shariela H route. She will join much later into the game and is an extremely useful character. This is especially important if you're aiming for an Ending A on a 0 CP playthrough.
 * On the other hand if you pick the option to bully Kaybnyan you will unlock them as supports and they will allow you to pick up to two red chests that will contain two unique weapons for Rance, the second chest requires having Merim alive
 * During the Pi-R extermination mission, there is a giant mechanical hand miniboss that only buffs itself with reinforcements and does not attack normally. After being debuffed 5 times with a character like Crane, it will stop trying to rebuff itself and will only heal when its HP reaches the halfway mark. If you are persistent enough, you can rank up all of your characters to level thirty using Willis or level 45 if you have the best version of her.
 * I've defeated the Demon King (魔王を倒したが) can be achieved by repeatedly leveling up characters without raising game difficulty by abandoning the quest right before the difficulty up square, then facing Demon King Kayblis on Turn 6 by not choosing to save Miki.
 * Bonus on a rare item when you turn off or turn on before fight, gives a different variation of awards
 * Always try to get as much exp as possible from any fight. Cumulative exp counts for meal tickets, so always aim for exp bonus from finishing within 3 turns and killing in one turn. Note that one turn kill doesn't require doing it on the first turn, you need to finish the same turn you started damaging opponent, you can use non-damaging skills like buffs or thieving or increase AP for a big combo on 3rd turn.

How to Get Notable Characters/Cards
A collection of card and card art may be found here. (Spoiler)
 * La Saizel
 * Defeat both La Saizel and La Hawzel together on 1st Leazas mission. You will get both characters and their (short-version) of  their H CG by doing their Base Event OR
 * Defeat La Hauzel alone and see two of La Saizel's ??? events on any mission on later Turns (10+). New Base Event will appear and you can get (long-version) of their H CG. Make sure the casualty is below 30%, so Arios won't come to kill her, preventing you from getting La Saizel's events
 * Nimitz Leek
 * In Leazas 2, be sure to defeat Atlanta and Juno within the 8 turn time limit.
 * Galtia
 * You need to defeat him in both consecutive food eating contests in Zeth 1.
 * This is easiest on turn 2 as the difficulty up squares affect the "HP" of the feast.
 * It's recommended to have at least 5 big eaters in your party. The usable ones are Kenshin, Biscutta, Kibako, Caloria, Desutora, Orime, Patton, Cordoba, and Terra (Horus Queen). They do "extra damage" to the feast. If you have less, you can grind up the ones you do have with the help of New Game plus bonuses to have a chance of winning.
 * (Female) Kesselring
 * Defeat Kesselring by one-turning Helman, collect every single one of her maids (8 of them) and do Base Event mission about reviving Kesselring OR
 * On Helman 2, go on the other route where you fight Kesselring early. OR
 * With New Game+ "all cards" bonus, his maids have extremely high drop rate since the beginning of the game. You can collect all of them and get Kesselring very early in the game
 * Warg
 * She will appear on random country on Turn 9 at the earliest only if you are doing very well with your game by one-turning at least 3 countries.
 * To fight Warg, only characters with at least 51 Star level can fight her. Every other characters below Star level of 51 will be unable to participate in fight, so be prepared.
 * Do her Base Event to officially get her card after that
 * Pope Crook
 * Do her Base Event mission before doing AL Church Preparation phase mission (Turn 5)
 * Wenlina & Serachrolas
 * Preparation mission in Leazas (Wenlina) and Helman (Serachrolas)
 * Can also be gotten on a random ??? square. The chances of encountering one of the two seems to be higher if Bezeleye if in the party.
 * Adult form of Holy Gal Monsters
 * Have the child form of the gal monster in your party during a battle where the EXP received ends in a 7. Interestingly enough, this works even if the battle is a yellow monster battle, and the gal monster technically isn't in the fight. This can also be done even if you have had sex with the adult form during the play through.
 * Toshin Sigma
 * Do Helman's Operation mission that visits Toshin City ruin
 * Any Nude cards
 * You can get Nude card of any female characters which have Star level of 10+ randomly on any treasure chest OR
 * Do Base Event "裸・裸・裸” although the card pool variation that you can get seems to be quite low
 * The chances of finding a nude card may be affected by how many ticket scenes you have unlocked for a character (unconfirmed)
 * please add more

How to Get Missable CGs
somebody please do this, I'm too lazy and already forgot most of it