One Turn Kill hidden achievements
Unlock every One Turn Kill hidden achievement with a clear checklist, completion stats, boss order, and practical tips for the full 18-achievement list.
What the One Turn Kill Hidden Achievements Include
The eight One Turn Kill hidden achievements are the real gate between a quick clear and a full completion. If you are chasing every unlock, the visible list is only part of the job; the One Turn Kill hidden achievements stay masked until you trigger them. That matters because the game tracks 18 achievements in total, and the objectives outside the visible set include a practice battle, five BIAS 5 bosses, a Rita milestone, and the scarecrow.
The good news is that the hidden set is mostly a progression checklist. You do not need a secret code or a rare drop; you need to touch every major battle milestone and then clean up the grind-heavy visible achievements. The table below turns the masked objectives into a usable plan.
| Hidden objective | Requirement in plain terms | What to prioritize |
|---|---|---|
| Practice battle with Rita | Complete a practice battle against Rita | Do it before a long run so it cannot be missed |
| Defeat BIAS 5 Captain | Clear the Captain boss at BIAS 5 | Work up the boss ladder and confirm the clear |
| Defeat BIAS 5 Azwen | Clear Azwen at BIAS 5 | Keep the same run focused on boss checks |
| Defeat BIAS 5 D-rex | Clear D-rex at BIAS 5 | Do not skip lower bosses on the way |
| Defeat BIAS 5 Bulk | Clear Bulk at BIAS 5 | Revisit if the achievement does not tick |
| Defeat BIAS 5 Pastor | Clear Pastor at BIAS 5 | Treat it as the final boss-ladder check |
| Reach Rita with total BIAS 20 | Reach Rita while your total BIAS is 20 | Track the threshold before you commit to a route |
| Defeat the scarecrow | Win the scarecrow encounter | Clear it during cleanup, then verify the unlock |
The exact descriptions remain hidden until each achievement unlocks, so use the objective names as your working checklist. If a clear does not produce a pop-up, repeat the associated battle or milestone before you move on. That habit saves more time than rebuilding a route from scratch.
Completion Stats and Difficulty Signals
These One Turn Kill hidden achievements are not evenly difficult. The practice battle is the most common hidden unlock, which makes it a low-risk first step. The BIAS 5 boss ladder gets steadily rarer as you climb, and the scarecrow is the least common of the eight. That pattern suggests a simple order: clear the early check, push the boss ladder, then hunt the scarecrow during cleanup.
| Hidden objective | Completion rate | Difficulty read |
|---|---|---|
| Practice battle with Rita | 51.45% | Easy early check |
| Defeat BIAS 5 Captain | 40.46% | Early boss check |
| Defeat BIAS 5 Azwen | 38.73% | Mid ladder |
| Defeat BIAS 5 D-rex | 32.95% | Mid ladder |
| Defeat BIAS 5 Bulk | 31.41% | Late ladder |
| Defeat BIAS 5 Pastor | 28.32% | Final boss check |
| Reach Rita with total BIAS 20 | 28.90% | Route planning |
| Defeat the scarecrow | 24.66% | Cleanup target |
With 519 players tracked and 95 at 100%, the full set is clearly achievable without being trivial. The gap between the practice battle at 51.45% and the scarecrow at 24.66% is the best signal for where the list becomes harder to finish. Do not save every hidden check for the end; front-load the ones that confirm your tracking is working.
How to Clear the Hidden Objectives
A clean route through the One Turn Kill hidden achievements starts with the practice battle and the first BIAS 5 clear in the same session. The practice battle gives you a low-pressure way to learn the turn flow, while the Captain clear confirms that boss achievements register. Once that works, keep the same route and climb.
Boss Ladder Order
Use the BIAS 5 boss ladder as a checklist rather than a difficulty ranking. The completion rates drop as you climb, so expect the later fights to take more attempts. Clear each boss once, confirm the unlock, and only then move to the next name.
| Step | Boss | Why it matters | Completion rate |
|---|---|---|---|
| 1 | BIAS 5 Captain | Confirms boss achievement tracking | 40.46% |
| 2 | BIAS 5 Azwen | Keeps the ladder moving | 38.73% |
| 3 | BIAS 5 D-rex | Mid-route check | 32.95% |
| 4 | BIAS 5 Bulk | Late-route check | 31.41% |
| 5 | BIAS 5 Pastor | Final boss-ladder check | 28.32% |
Rita and Scarecrow Cleanup
The Rita milestone is a threshold check, not a boss clear. Keep your total BIAS in view and do not overcomplicate the route; reach Rita at 20 and confirm the unlock. The scarecrow is the lowest-rate hidden objective, so treat it as a dedicated cleanup task rather than something you will stumble into.
What to Do If a Hidden Achievement Does Not Unlock
If a boss or milestone does not register, repeat the associated action before moving on. Confirm that you cleared the correct BIAS 5 version, that the practice battle actually completed, and that your total BIAS was 20 when you reached Rita. The interface hides descriptions until unlock, so a missing pop-up is not proof that the objective is bugged.
Visible Achievements That Support the Hidden Grind
The visible list is not busywork. Several visible achievements overlap with the One Turn Kill hidden achievements because they reward the same card-playing and upgrade sessions you need for a complete save. The One-Turn Kill achievement is the easiest anchor: clear an enemy inside a single turn, then use that same aggressive build to push damage and card-count objectives.
| Visible achievement | Requirement | Practical tip |
|---|---|---|
| One-Turn Kill | Clear an enemy in one turn | Use your fastest opener; do not spread damage |
| Power Up | Upgrade a card | Upgrade early to unlock the system |
| Tireless | Use 500 cards total | Let card-heavy turns add to the lifetime count |
| Card Collector | Unlock all cards | Finish unlocks before a long upgrade session |
| Game Completed | Finish the game | Save it for the end of the route |
| Overkill | Deal 150+ damage in one attack | Save your highest-damage attack for a single hit |
| Route 98 | Use Laevatein with Homeward Bound effects | Keep both pieces available and trigger them together |
| Perpetual Motion Machine | Use 50+ cards in one turn | Plan a dedicated combo turn |
| Gadget Junkie | Upgrade all cards | Pair it with Card Collector |
| Orbit | Activate five Procyon Devices | Track device activations across runs |
Treat the upgrade achievements as a pair. Power Up, Card Collector, and Gadget Junkie all reward the same collection work, so finish card unlocks before you spend a long session on upgrades. Tireless and Perpetual Motion Machine also overlap: one counts total cards used, while the other asks for a single huge turn. Build toward the big turn and let the lifetime count fill in naturally.
A Practical Completion Route
Use this order to finish the One Turn Kill hidden achievements without turning the run into a spreadsheet. The sequence front-loads low-risk checks, then moves into the boss ladder, then cleans up the grind. If you prefer to chase visible achievements first, keep the practice battle and first boss clear early so the hidden tracking is confirmed.
| Phase | Focus | Achievements to target | Why |
|---|---|---|---|
| 1 | Practice and first clear | Practice battle with Rita, One-Turn Kill, Power Up | Low risk and confirms tracking |
| 2 | Boss ladder | Captain through Pastor | Five hidden checks in sequence |
| 3 | Rita threshold | Reach Rita with total BIAS 20 | Route milestone |
| 4 | Scarecrow cleanup | Defeat the scarecrow | Lowest-rate hidden check |
| 5 | Card grind | Tireless, Perpetual Motion Machine, Card Collector, Gadget Junkie | Long-tail visible work |
| 6 | Final polish | Overkill, Route 98, Orbit, Game Completed | Endgame checks |
The final polish phase is where most clean-up happens. Overkill, Route 98, and Orbit all benefit from a deliberate setup, so do not leave them to chance during a speed run. Game Completed should come last because it signals the end of the route, not because it helps with the hidden checks.
The hidden set is a route problem, not a reflex problem. If you build a checklist around the practice battle, the five BIAS 5 bosses, the Rita threshold, and the scarecrow, you remove most of the guesswork. Then the remaining visible achievements become a straightforward cleanup pass.
FAQ
How many One Turn Kill hidden achievements are there?
There are eight hidden achievements and 18 total achievements. The other 10 are visible in the achievement list, including One-Turn Kill, Power Up, Tireless, Card Collector, Game Completed, Overkill, Route 98, Perpetual Motion Machine, Gadget Junkie, and Orbit.
Are the One Turn Kill hidden achievements missable?
Nothing in the achievement list marks them as permanently missable. Even so, clear the practice battle and each BIAS 5 boss once so you are not relying on a later replay. If a clear does not register, repeat the associated action before moving on.
What is the rarest One Turn Kill hidden achievement?
Among the tracked completion rates, Defeat the scarecrow is lowest at 24.66%. Defeat BIAS 5 Pastor follows at 28.32%, and Reach Rita with total BIAS 20 is close behind at 28.90%. Those three are the best targets for a dedicated cleanup session.
Do the One Turn Kill hidden achievements require finishing the game?
Not directly. The hidden set is built around the practice battle, BIAS 5 bosses, Rita threshold, and scarecrow. Game Completed is a separate visible achievement, so treat it as its own end-of-route task rather than a requirement for the hidden checks.