OFF is short enough to finish in a few sessions, but it is not a game to rush blindly. The Steam release keeps the original RPG structure while adding achievements and extra endgame fights, so a clean completion route needs three things: puzzle answers, save discipline, and a plan for Purified Zone cleanup before the final point of no return.
This walkthrough is written for players who want the full route without missing the important one-time checks. It covers Zone 0 through The Room, the major puzzle codes, the Zacharie roller coaster achievement, the secret bosses added for the Steam release, both standard endings, and the true-ending item chain. Heavy spoilers start immediately.
Best Route For One Clean Completion
- Clear Zone 0 normally and get comfortable with the game's keypad-style puzzles.
- In Zone 1, collect Alpha, clear the barns, solve the Shachihata and Alma codes, then defeat Dedan.
- In Zone 2, finish the Library and Amusement Park route. Before fighting Japhet, put Zacharie's statue on the roller coaster and ride it for the missable achievement.
- In Zone 3, pick up Epsilon, solve the Sugar Treatment and factory puzzles, then defeat Enoch.
- Before committing to the ending, make a separate save. Use it for Purified Zone cleanup, Grand items, secret bosses, and achievement checks.
- Enter The Room only when you are ready for the final chain. Buy late gear from Zacharie, keep enough credits for the Grand Brachial, and save before the Queen.
- For both standard endings, reload at the final decision: choose the Batter once and the Judge once.
- For the true-ending route, collect the five Grand items, trade for the Aries card instead of the Ashley bat, equip the Aries card, and finish the game with that route active.
Save Slots And Missable Checks
| When To Save | Why It Matters |
|---|---|
| Before defeating Japhet in Zone 2 | The achievement We are not really friends. requires Zacharie's statue on the roller coaster before Zone 2 is purified. |
| After Zone 3, before deep cleanup | This is the safest base for Purified Zone item runs, secret bosses, and money grinding. |
| Before entering the final stretch of The Room | The Cob fight and several ending steps happen close to the point of no return. |
| Before the final choice | Reload here to unlock both the Batter ending and the Judge ending without replaying the whole game. |
| Before trading with Zacharie for the true-ending item | For the true-ending achievement, choose the Aries card. Trading for the Ashley bat can lock that route out. |
Zone 0 Walkthrough
Zone 0 is a tutorial, but it also teaches the style of OFF's later puzzle logic. Numbers on walls often map to physical positions, and the game expects you to think of many block puzzles like a keypad rather than a normal maze.
| Puzzle | Solution | Note |
|---|---|---|
| Four moving squares | Use the squares in wall-number order: top left, bottom left, top right, bottom right. | If you lose the pattern, step back and read the wall again instead of guessing. |
| Eight cubes | Use the numbered cube order shown by the room: top-left, top-right, lower middle-left, lower right, upper middle-left, upper middle-right. | The layout is positional. Treat the top row and bottom row as a diagram. |
| Calculator-style cube code | Find the wall clue in the nearby house, then input 448287C on the cube keypad. | The final C is the confirm key. |
Leaving Zone 0 unlocks Did the hardest part. on Steam. That achievement is automatic, but the lesson is important: later areas rarely hide their answers completely. They scatter the answer across notes, posters, employees, sound cues, or object layouts.
Zone 1 Walkthrough
Zone 1 has four practical goals: recruit Alpha, reach Shachihata, solve the postal/elevator chain, and open the path to Dedan. It is also the zone where many players learn that optional chests are helpful but not always worth a dangerous detour on the first pass.
Damien And The Mines
Ride the monorail to Damien, talk to the miner, and search the small house for an early chest. Descend into the mines to recruit Alpha, your first Add-On. In the mine route, keep an eye out for optional chests, but prioritize survival over clearing every branch immediately.
The mines contain a hidden switch disguised as an unlit lamp. If a door says it is locked from the inside, inspect the lamps along the wall and use the odd one to open the hidden room. This is worth doing because OFF often hides useful resources behind small environmental differences.
Barns And Stone Puzzle
At the barns, defeat the specters, then solve the simple stone block puzzle to reach the last one. The safe method is to move the lower stone upward, slide the right-hand stone farther right, then push the upper stone upward to make the passage. If you make a mess, leave and re-enter the area to reset the layout.
Shachihata Elevator Codes
Shachihata is built around the huge elevator. The important floors are:
| Code | Destination | Use |
|---|---|---|
| 00001 | Ground floor | Use this when you need to return to the main level. |
| 10258 | Postal Service | Main progression route for the next code. |
| 02584 | Lost Property Office | Optional items. |
| 87666 | Zacharie / Secret Service style floor | Shop access and a zodiac orb in the readable walkthrough references. |
In the Postal Service, read the numbered versions of the notes and pull the hidden numbers out in version order. The resulting code is 681452.
Alma Quiz, Cube Code, And Dedan
Alma blocks progress with questions based on posters. The verified answer sequence is:
| Prompt Type | Answer |
|---|---|
| Origin / named clue | Orta |
| Holy Trinity clue | Roses |
| Jersey clue | Sixth |
| Number clue | 22 |
| Name clue | Jonas |
| Two-digit number | 87 |
After the pedalo sequence, the cube/keypad solution is reported differently by the readable references. The older full-route reference gives 498256, while the Zone 1 article records the complete numbered path as 4982659 followed by the bottom confirm block. If your version uses the visible pair clues from the pedalo route, follow the numbers you saw in-game; if you are on the Steam release and the longer input is accepted, use 4982659 and confirm.
The last maze before Dedan uses sound as the guide. Move toward the door where the music is loudest, then continue until the exit appears. Dedan unlocks You dared to kill me??. If he is pressuring you, use healing items aggressively and treat his clock-based turns as warning signs for stronger effects.
Zone 2 Walkthrough
Zone 2 is the most important zone for missable achievement planning. Before you defeat Japhet, you must handle Zacharie's statue at the roller coaster. Once Zone 2 is purified and saved over, that Steam achievement cannot be safely recovered from the same file.
Library And Missing Pages
On the Library's second floor, restore the missing pages to their matching books. Three pages are found on the floor, but the hearts page requires a short detour west of the Library. Find the man asking you to come closer, take the missing page, and return it to the correct book.
Mall, Pedalo, And Amusement Park
The Mall loop is solved by progressing until you meet the Judge near the mural of Valerie, then leaving by the northern path once the barricade is cleared. After that, use the pedalo route to reach the Amusement Park.
In the Amusement Park, do not rush to Japhet. Push Zacharie's statue onto the front seat of the roller coaster cart and ride it. This unlocks We are not really friends. The achievement guide marks this as missable if you defeat Japhet and save afterward.
The balloon game is a losing-position puzzle. The practical approach is to force the opponent into taking the board when five balloons remain. If you are off by one, restart the pattern rather than trying to improvise late.
Residential District And Library Code
Once you enter the Residential District, the bunker clues are learned from residents during the timed sequence. Some readable guides list example codes such as 1805, 1709, and 1402, but treat the in-game residents as the authority if your route differs. The important progression code for the later Library barricade is 49971640.
Defeating Japhet unlocks Forgive me for my crimes. After Zone 2 is purified, you can return later for Maldicion and Grand Diagonal cleanup, but it is usually easier to finish Zone 3 first so you have the full party.
Zone 3 Walkthrough
Zone 3 is longer and more mechanical than the earlier zones. It is also the route to Epsilon, your final Add-On, and several puzzles here become important again during Purified Zone cleanup.
Dormitory Minefield
Save before the minefield. The Stamped Note gives the safe-tile logic, and you should move in straight counted lines between marked safe points. Use the route colors as goals rather than wandering: one route leads to dormitory progression, one reaches Epsilon in the eastern dorm, and another reaches Zacharie and the path onward.
Sugar Treatment Building
The first switch puzzle is solved by disabling the three switches in the bottom-right area, flipping the lone switch near the entrance, then turning the switch marked C back on to open the northern door.
For the second switch puzzle, start with the top-right switch, then the center switch, then the top-left switch. After claiming the chest, reset the center and top-right switches until the western door is open.
The door password is Von Gacy. The intended clue is the enemy silhouette and the name shown by Wide Angle-style analysis, but the password is fixed in the readable walkthrough references.
Factory, Gamepad, And Enoch
The factory drop starts a falling minigame. Collect ten Add-Ons while avoiding specters; touching enemies costs health, and sloppy collection can fail even if you pass through the general area, so aim for the center of each pickup.
| Late Zone 3 Check | Solution |
|---|---|
| Gamepad room | Down, Left, Up, Right, Z, J, B, D, B, Start |
| Reverse keypad | 536258C |
| Enoch first encounter | When your attacks do almost nothing, flee and follow the chase sequence rather than wasting resources. |
After Enoch falls, you receive the Aquarias card and can enter The Room. This unlocks What do you think you are doing? on Steam.
Purified Zone Cleanup And Secret Bosses
The Steam release adds a strong achievement reason to revisit Purified Zones. These bosses are not needed for the original two endings, but they matter for 100% completion and for the true-ending item chain. If they feel too hard as soon as they unlock, finish Zone 3, stock up, and then return with the full party.
| Boss / Goal | Where To Find It | Practical Strategy | Achievement / Item |
|---|---|---|---|
| Source | Purified Zone 1, beyond the simple rock puzzle near the former metal farm route. | Source sets up healing and thorn damage. Push damage early, cure poison, and save heavier resources for the thorn phase. | What are you doing? |
| Grand Finale | Purified Zone 1, in the far treasure route reached after the pedalo/keypad-style area. | Take this before hunting Sugar. A Steam guide comment suggests the Zone 0 cellar trigger is most reliable with Grand Finale. | True-ending Grand item. |
| Maldicion | Purified Zone 2, toward the former Amusement Park / roller coaster area. | Its Impure effect creates changing elemental weaknesses. Watch the battle messages, use the element that matches the weakness, and keep healing ready for party-wide pressure. | Violently happy. |
| Grand Diagonal | Purified Zone 2, in a locked far-eastern room reached through the altered Mall route. | The achievement guide records 1709 for the relevant lock. Check the nearby room clue if your version prompts differently. | True-ending Grand item. |
| Psalmanazar and Herodotus | Purified Zone 3, through the furnace route and down the long secret ladder. | Do not overattack while Defamed is active. The guilty damage can rebound hard; defend, heal, or use safer actions until the status resolves. | You lost. |
| Grand Spectral | Purified Zone 3, from the former Enoch route into the empty looping world. | Travel diagonally through the empty loop and enter the first correct door you find. | True-ending Grand item. |
| Sugar | Zone 0 cellar, after you have at least one Grand item. Grand Finale is the most consistently referenced trigger. | Sugar is tougher than most main bosses. Poison works despite confusing weakness display reports, and taking out the dummies first makes the fight safer. | That's mean 🙁 and Grand Chocolatier. |
| Justus | The Room entrance, right-side staircase after the first three Purified Zone bosses are gone. | Mostly a direct fight using Batter/Add-On style moves. Reach Zacharie in The Room first if you want better gear. | I won. |
| Carnival | The upper-left portal in the Nothingness after Justus. | Carnival rotates boss games. Aquarius rewards competences, Pisces rewards taking damage, Cancer rewards elemental attacks, and Leo rewards healing or CC recovery. | I loved you very much. |
| Cob | After the Queen, before Hugo's room, if the previous secret bosses are defeated. | Cob watches a target, vilifies the party, then uses Ionosphere to kill that target. Revive with Jokers, poison when possible, and do not panic over the party-wide damage. | Everything you do is useless. |
The Room Walkthrough
The Room is less about conventional exploration and more about understanding when the game has changed the rules. Keep a save outside the endgame if you still need cleanup.
Early Room Chapters
The first long hallway can loop endlessly if you keep forcing forward progress. The key lesson is to reverse direction when the game traps you. The readable LPArchive updates and walkthrough references both frame The Room as a sequence of repeated spaces that change after each pass, so re-check old doors, calendars, bedrooms, and alternate exits instead of assuming the map is static.
Later chapters revisit the guardians and personal memories in distorted forms. The practical advice is simple: read every room after each transition, keep your party healed between fights, and buy from Zacharie whenever he appears. The Steam release's secret-boss route makes his late inventory especially important because you need enough credits for the Grand Brachial.
Queen, Hugo, And The Final Choice
The Queen fight unlocks You're wrong. Use normal boss discipline: clear or control the supporting pieces, keep the Batter and Add-Ons alive, and do not spend every Joker if you still plan to fight Cob on the same route.
After the Queen, the ending route depends on the final choice:
| Choice | What Happens | Achievement |
|---|---|---|
| Choose the Batter | Defeat the Judge, then turn the switch OFF. | It's done. |
| Choose the Judge | Fight and defeat the Batter as the Judge. | A morning without light. |
| True-ending route | Collect all five Grand items, trade for the Aries card, equip it, and finish the game with that route active. | Our plan was perfect. |
True Ending Grand Item Checklist
The public achievement name for the true-ending route is Our plan was perfect. Steam's API name for the same achievement is Monkeys, and the community achievement guide links it to the Aries card route. The important part is not just owning the Grand items; it is making the correct final trade.
| Grand Item | Source | Risk |
|---|---|---|
| Grand Finale | Purified Zone 1 treasure route. | Use this as the safe trigger for Sugar's Zone 0 cellar route. |
| Grand Diagonal | Purified Zone 2 locked room, with 1709 reported as the lock code. | Zone 2 map layout differs in the Steam release; use the altered Mall exit if the old route seems blocked. |
| Grand Spectral | Purified Zone 3 empty-world route near the former Enoch area. | The looping space can feel wrong; travel diagonally and enter the first correct door. |
| Grand Chocolatier | Reward tied to defeating Sugar. | Sugar is resource-heavy. Bring Jokers and poison options. |
| Grand Brachial | Set aside 5000 credits and purchase it from Zacharie during The Room, before you start the Queen battle. | Do not enter the final route broke. Grind or sell safely before committing. |
After collecting the five Grand items, return to Zacharie in Zone 0 and choose the Aries card. Do not take the Ashley bat if you are going for the true-ending achievement. Equip the Aries card before finishing the game.
100% Achievement Checklist
| Achievement | How To Unlock It | Missable? |
|---|---|---|
| Did the hardest part. | Exit Zone 0. | No. |
| You dared to kill me?? | Defeat Dedan in Zone 1. | No. |
| We are not really friends. | Put Zacharie's statue on the Zone 2 roller coaster and ride it before defeating Japhet. | Yes. |
| Forgive me for my crimes. | Defeat Japhet in Zone 2. | No. |
| What do you think you are doing? | Defeat Enoch in Zone 3. | No. |
| You're wrong. | Defeat the Queen in The Room. | No, but it is late-game. |
| It's done. | Choose the Batter at the final decision, defeat the Judge, then turn OFF the switch. | Use a final-choice save. |
| A morning without light. | Choose the Judge at the final decision and defeat the Batter. | Use a final-choice save. |
| What are you doing? | Defeat Source in Purified Zone 1. | No, if you keep a cleanup save. |
| Violently happy. | Defeat Maldicion in Purified Zone 2. | No, if you keep a cleanup save. |
| You lost. | Defeat Psalmanazar and Herodotus in Purified Zone 3. | No, if you keep a cleanup save. |
| That's mean 🙁 | Defeat Sugar from the Zone 0 cellar route after obtaining a Grand item. | No, but Grand Finale appears to be the safest trigger. |
| I won. | Defeat Justus from the right-side staircase in The Room. | Do it before the final lock-in. |
| I loved you very much. | Defeat Carnival through the upper-left portal in the Nothingness after Justus. | Do it before the final lock-in. |
| Everything you do is useless. | Defeat Cob after the Queen and before Hugo's room, with the prior secret bosses cleared. | Yes, because it sits near the point of no return. |
| Our plan was perfect. | Finish the Aries card true-ending route after collecting the five Grand items. | Yes, if you trade for the wrong item. |
| You deserve a reward. | Unlock every other achievement. | Depends on the missables above. |
Common Mistakes
- Saving after Japhet without the roller coaster achievement: do the Zacharie statue ride first.
- Burning all money before The Room: keep 5000 credits for Grand Brachial if you want the true-ending route.
- Assuming every code is version-proof: use fixed codes where confirmed, but trust in-game clues if a Steam route changed a room layout.
- Entering the final stretch before cleanup: secret bosses and Cob are easier to manage from a dedicated pre-endgame save.
- Trading for the wrong true-ending reward: pick the Aries card, equip it, and finish with that route active.
- Overattacking during Defamed: the Purified Zone 3 secret boss can punish reckless damage when the status resolves.
Sources And Credits
Official metadata and screenshots are from the OFF Steam page and the official site at offtherpg.com. Walkthrough details were cross-checked against readable community walkthrough references, LPArchive endgame coverage, and Steam Community achievement / secret-boss guides. Inaccessible pages, Cloudflare verification pages, and blocked FAQ pages were not used as factual sources.