One Turn Kill Upgrade Chips: How to Unlock and Use Them
One Turn Kill upgrade chips are permanent progression tokens that enhance individual cards at the Upgrade Facility. You obtain chips from the departure screen by clearing stage BIAS thresholds and claim them through the reward menu after completing boss encounters.
One Turn Kill upgrade chips are permanent progression tokens that enhance individual cards at the Upgrade Facility. You obtain chips from the departure screen by clearing stage BIAS thresholds and claim them through the reward menu after completing boss encounters.
How Do You Unlock the Upgrade Facility in One Turn Kill?
The Upgrade Facility is a base camp menu unlocked after clearing a run with a total BIAS level of 6. BIAS represents the sum of the enemy difficulty levels selected across your mission route on the departure screen. Setting two bosses to Level 2 provides the required score of 6 to open the facility, as verified on the Steam store page community discussions.
Upgrade chips accumulate as milestone rewards tied to each enemy level. You collect these rewards from the departure screen by clicking the reward icons or using the claim button. Defeating higher-tier encounters grants lump sums of chips, card unlocks, and starting skills. All skills unlock once you reach BIAS 15, while higher difficulties up to BIAS 20 provide surplus chips to complete your collection.
What Are the Best Card Upgrades to Prioritize?
Priority card upgrades are single-purchase power spikes that multiply your damage output or card draw efficiency. Each card accepts exactly one enhancement, with prices ranging from 20 to 60 chips depending on the power of the bonus. Because early chip income is limited before reaching higher BIAS runs, choosing upgrades that support your preferred deck building strategy prevents wasted resources.
| Upgrade Option | When to Pick | Cost and Trade-off |
|---|---|---|
| Intuition+ | Decks that play multiple multi-hit attack cards | Costs 20 chips; doubles the attack buff from +3 to +6 per cast |
| Heavy Blow+ | Decks holding high-cost hands like Axium Core | Costs 40 chips; adds a second attack strike if attack reaches 50 |
| Transcode+ | Rapid draw loops that return cards to the deck | Costs 60 chips; generates a random attack card on return but gains Fragile |
| Tea Party of Kannazuki+ | Decks relying on expensive finishers like Assassin's Sign | Removes the 3-cost restriction to make any two cards cost 0 |
Certain upgrades alter fundamental card behavior in unexpected ways. Upgrading Transcode adds a Fragile tag, causing it to discard if another card is played before it. Players documenting technical card interactions in the note.com player notes observe that leaving Transcode at its base state is often preferable for standard deck cycling. In contrast, enhancing Heavy Blow provides dependable burst damage against late-game targets without introducing negative card restrictions.
How Does Card Toggling Work in the Upgrade Facility?
Card toggling is an in-game feature that swaps a card between its baseline state and its enhanced form without refunding spent chips. Clicking the reset button inside the Upgrade Facility switches the selected card back to its standard version at any time. This toggle allows you to test both versions in battle without losing the purchase.
Spent chips remain committed to that specific card permanently. Because chips cannot be refunded or transferred to other cards, allocating early chips toward universal staples like Intuition and multi-strike attacks delivers more consistent results than upgrading niche Fragile cards. When pairing upgraded cards with temporary combat skills such as Double, the duplicated card copies the current upgraded stats and active buffs during that turn.
Next step
Best Decks
Compare top One Turn Kill deck builds, card combos, and skill choices to defeat every boss through maximum BIAS difficulty.
Related Guides
One Turn Kill Backdoor Card Guide & Combos; One Turn Kill Guide: Core Rules and Deck Builds