KKOTAMONIndependent field guide
Field guide

How to Repair and Upgrade Cards in KOTAMON

Repair damaged cards and use KOTAMON's official duplicate-card exchange without guessing at values, missing-card odds, or unverified shortcuts.

Updated 2026-09-06 · Evidence-backed · Spoiler-aware

Section 01

What condition means

The official Steam description says cards can be crumpled, damaged, or torn and that better-condition cards cost more. Condition is therefore a per-copy property with an explicit relationship to resale value. Public sources do not fully document every binder-counting edge case, so this guide does not assume that a damaged, repaired, swapped, or foil copy is counted identically for every achievement.

Section 02

Can you repair cards?

The retail game uses a hands-on repair process for cards assembled from damaged pieces. The official store confirms that cards can be mended, while retail players describe positioning pieces as a repeated late-game task. The exact interface is best learned from the current build because balance and convenience features may change after launch; older demo descriptions should not be treated as permanent retail rules.

Section 03

Should you repair or sell?

For a design that may be needed for a set achievement, keep one copy until the in-game binder and achievement state confirm completion. For duplicates, compare the displayed sale value before and after repair with the time the repair takes. The store confirms that condition affects price, but it does not publish a universal repair-cost formula. A low-value duplicate may not justify a long manual repair even when its final price is higher.

Section 04

Condition and the price tracker

Because condition changes sell value, this site does not publish fixed universal prices. Track your own sales by rarity and condition, and use the community-reported trend as a rough guide rather than a guarantee.

Section 05

Swapping duplicates

The August 27 official update confirms the current exchange rule: three duplicate cards of the same quality can be exchanged for one complete card of a higher quality, including a foil card. The update says eligible cards receive a yellow border and arrow indicator, and the collection screen shows a green level-up button for the exchange. This is a quality-upgrade route, not a way to request a specific missing design. Before confirming, check that all three copies are truly the same quality and that you are willing to give up every displayed input card.

Section 06

Upgrade duplicates before deciding whether to sell

Use the official exchange only when you have three duplicate copies of the same quality and the on-screen indicator is present. First keep any copy you still need for a collection goal. Then compare the exchange inputs and result in the live prompt; take a screenshot if you are uncertain, because an exchange changes your binder inventory. The developer has not published a universal sale-value formula or a rule that upgrading is always more profitable than selling. Treat the exchange as a way to improve card quality, and make the money decision from the values shown in your current build.

Section 07

A safe repair workflow

Identify the card before moving pieces, keep the work area clear, and begin with the most distinctive corners or borders. Rotate and place pieces deliberately instead of rapidly testing every position. When the card is complete, compare its name, rarity, condition, and displayed value with the pre-repair state. If a piece will not register, stop before overwriting or discarding anything, capture the screen, and reload only through normal menus. This process is slower than guessing but produces useful evidence if the interface is actually failing.

Section 08

Repair for collection or repair for profit

These are different decisions. Collection repair protects a design you still need, so certainty is more important than immediate income. Profit repair asks whether the improved selling price is worth the manual time. Use duplicate cards to estimate that tradeoff in your current build because economy updates can change upgrade prices, card values, and the opportunity cost of another trash run. Do not publish one fixed best threshold as if every rarity and condition shares the same numbers.

Section 09

How to handle late-game repair fatigue

Retail community feedback describes repeated repairs as tedious once duplicates become common. That complaint establishes a player pain point, not an existing automation feature. Reduce unnecessary work by checking the design and condition before starting, keeping only the copies that serve a collection or sale goal, and grouping repair sessions rather than interrupting every dump run. If the developer later adds automation, update the guide from the official patch note instead of presenting a community feature request as implemented.

Section 10

Diagnosing a repair that will not complete

Confirm that every visible fragment belongs to the current card and that no piece is hidden under another. Reset the view using only available interface controls, then retry the border pieces. Note the game version, input device, display resolution, and whether the same fragment fails after a normal restart. Avoid editing saves or using third-party tools. A concise reproduction sequence posted to the official Steam discussion area is more useful than a report that only says the puzzle is broken.

Section 11

What this guide does not claim

It does not claim that condition changes HP or ATK, that every foil can be damaged, that one exchange always improves rarity, or that a repaired copy always satisfies a set achievement. Those details require direct retail evidence or an official explanation. Where the current public evidence stops, the in-game value and binder state remain the authority. This boundary keeps repair advice useful without turning reasonable assumptions from other card games into KOTAMON facts.

Sources

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