Lost Castle 2 Achievements Guide: All 85 Explained

Lost Castle 2 achievements: there are 85 of them, and that number sounds like it was picked for the sake of a round-ish figure. It wasn't. I pulled it three separate ways from Steam's own data before I trusted it enough to write this: the stats page states the total plainly, and it lines up exactly with the game's own achievement API and its store listing. What doesn't show up anywhere in-game is a checklist. There's no in-game achievement tracker sorted by category, no hint text for most of the harder ones, and at least one popular third-party guide I checked while researching this currently miscategorizes a mainline achievement as a secret one. So that's what this guide does instead: every achievement, grouped by what actually earns it, current global completion rates pulled live rather than from a two-month-old snapshot, and the corrections that come from checking Steam's own data against the guides already out there.

TL;DR: Lost Castle 2 has 85 Steam achievements, all in the base game (the only DLC is a $2.99 soundtrack with no achievements of its own). They break into natural progression and collection (11), weapon mastery (9), co-op (1), main-story bosses (11), the four secret regions and their bosses (13), difficulty tiers (7), Memory Shards and the Hidden Mage Tower (6), Soulstone and Soul Seal endgame systems (11), companion recruitment (6), and camp/economy cleanup (10). The rarest right now is Peak Warrior at 3.9%; the most common is Adventure Begins at 97.9%.

How many Lost Castle 2 achievements are there? (quick answer)

85. That number comes from three independent Steam sources checked today, not one fan estimate: the live Community stats page for the game states "Total achievements: 85" directly, the public GetGlobalAchievementPercentagesForApp API returns exactly 85 named entries, and the store's appdetails API separately lists achievements.total: 85. All three agree, and none of them describe a base-game-versus-DLC split. Lost Castle 2's only DLC on Steam is a $2.99 soundtrack pack, and its own listing shows zero achievements attached to it. If you've seen a search result claiming something like "27 base game, 58 across two DLC packs," that's describing a different game. Every one of the 85 ships in the base $17.99 release.

Key Takeaways

• 85 achievements total, all in the base game, confirmed against three separate Steam data sources pulled today
• No base/DLC split exists for this title; the only DLC is a soundtrack pack with 0 achievements
• Global completion rates shift fast in a young 1.0 release: Seek the Truth roughly doubled from 13% to 26% in about two months as more players found the Memory Shard route
• One popular fan guide miscategorizes "Open the Gate" as part of the Mage Tower unlock chain; it's actually the achievement for first reaching the Black Castle, sitting at 82.7% completion, nowhere near a rare secret trigger
• "Peak Showdown" has no documented unlock condition anywhere online; cross-referencing Steam's internal achievement IDs points to it being the first-entry trigger for the Hidden Mage Tower itself

Achievements you'll earn without trying

Eleven achievements track natural progress rather than anything you need to plan for. Three of the collection tiers, in particular, climb on their own the longer you play, since treasures and weapons record automatically the first time you pick each one up.

Don't grind these directly. Just keep playing and picking up drops you'd normally skip, and the collector tiers close out somewhere around the point you unlock Ethereal Nightmare mode. The jump from Senior (100 items) to Top (200 items) is where the drop-off starts, since it needs enough varied runs to have actually seen 200 distinct treasures or weapons cross your inventory.

Weapon mastery: all 9 categories

Each weapon achievement asks for one successful, run-ending clear using that weapon type. There's no minimum difficulty attached to any of them, so a comfortable Normal or early Nightmare clear counts the same as a Nightmare 5 run.

Blademaster sits noticeably below the rest. Katana runs lean on tight dodge timing rather than raw stat scaling, and a lot of players who'd otherwise clear it stick with whichever weapon their current build is already invested in instead of switching for one achievement. If you're chasing the full set, do it early with a low-difficulty clear on each weapon before you commit hard to a single Nightmare build; retrofitting a weak weapon into a stable late-game run wastes more time than just banking the achievement on Normal first.

GODEEPER: Not sure which weapon category is actually strong right now versus just easy to clear once? The full ranking covers all 9. Lost Castle 2 Weapons Tier List: 9 Categories Ranked →

Co-op: one achievement, easy to miss

Party Adventure unlocks by starting an adventure in online multiplayer mode, sitting at 72.3% completion. That's lower than most of the natural-progression tier above, which tells you something: most players finish a good chunk of the solo campaign before ever touching co-op, if they touch it at all. If you know you'll eventually play with a friend, start one shared run early just to bank this rather than saving it for later.

Boss and area achievements: the main story path

Twelve bosses sit on Lost Castle 2's core story path, and eleven of them have a tied achievement (the final demon after Steward doesn't have its own separate one). Four are visible on Steam's stats page with full descriptions; seven are marked hidden, meaning Steam blanks the text until you've earned them. This site's own Lost Castle 2 boss guide covers tactics for every fight below by name.

One correction is worth flagging directly. A separately-published fan achievements guide lists "Open the Gate" under its Mage Tower unlock section at a 4.8% completion rate. That doesn't hold up. Steam's own live description for this achievement, visible without needing to unlock it, reads "Successfully open the gate of the Black Castle," and its current global rate is 82.7%, matching its internal achievement ID (FirstEnterMainCastle) almost exactly. A jump from 4.8% to 82.7% in two months would mean nearly the entire playerbase suddenly cleared a rare secret trigger, which isn't how completion rates move. It's simplest explained as a main-story milestone (reaching the Black Castle) mislabeled by that guide as something rarer. Treat "Open the Gate" as a natural-progression achievement, not a hidden-area one.

The four secret regions and their bosses

Beyond the 12-boss main path, four additional regions exist as side content: Frozen Cave, Mudfish Swamp, Saltpeter Desert, and Castle Dungeon. Each has its own first-entry achievement and its own boss (or two).

Frozen Cave gets the deepest coverage on this site already, since its two achievements (Bushido Duel and Vigil Ends) are only the entry point. Clearing both bosses there doesn't unlock anything extra by itself; it's a separate 11-shard collection chain that eventually triggers a much bigger secret.

Memory Shards and the Hidden Mage Tower

Six achievements tie into Lost Castle 2's biggest hidden content chain. This site already has a full walkthrough covering all 11 named shards, exactly where each one drops, and the step-by-step Frozen Cavern trigger sequence, so this section stays brief on purpose.

Peak Showdown is the one genuine mystery left in this whole list, and I'll admit I spent longer on it than I expected to. Steam blanks its description like every other hidden achievement, but unlike most of them, no fan guide anywhere documents what it actually asks for either. Here's how I built the case for "first entering the Mage Tower": at the same 20.9% completion tier sit exactly two achievements and two internal Steam IDs. One pairing is obvious by name match (Plagued Body pairs with the internal ID "Plagued"), which leaves the other internal ID, "FirstEnterMageTower," with only one achievement left to pair against: Peak Showdown. That's elimination logic against Steam's own backend data, not a guess, though it's still short of an official confirmation from Hunter Studio. If you're chasing full completion and Peak Showdown hasn't popped, the safest assumption is that simply walking into the tower once the "Stage Unlocked" message appears is what triggers it.

GODEEPER: Seek the Truth alone doesn't explain where any of the 11 shards actually drop, or how the Frozen Cavern trigger sequence works step by step. That's covered in full here. Lost Castle 2 Memory Shards: All 11 & Mage Tower Guide →

Nightmare difficulty achievements

Five achievements track clearing Ethereal Nightmare's difficulty tiers in order, from Depth 1 through Depth 5. Difficulty scales sharply between the first three and the final two.

The drop from Depth 3 (26.4%) to Depth 4 (15.5%) is the largest gap in this whole tier, roughly 11 points, which lines up with what this site's own Ethereal Nightmare coverage already found: Depths 4 and 5 launched at 1.0 alongside Inscription Resonance III, and a build that isn't leaning on a fully-unlocked Soul Inscription and its resonance skill hits a real wall there.

BETTER PRICE: Lost Castle 2 is $17.99 on Steam (no active discount). $8.39 on Loaded → (sponsored): same Steam key, a meaningfully lower price if you're picking the game up new to chase this list.

Soulstones, Soul Seals, and endgame achievements

Eleven achievements sit behind Nia's endgame systems, unlocked after finishing the main campaign once. These use the game's own achievement text, which refers to "Soul Seals" specifically, a term distinct from the "Soul Inscription" per-weapon system this site's builds guide covers in depth; both appear to belong to the same late-game meta-progression layer, though Hunter Studio hasn't published anything explicitly tying the two terms together.

Peak Warrior is the rarest achievement in the entire game right now, at 3.9%. That tracks: it asks for full resonance across every Soul Seal simultaneously, which means every weapon category's endgame system maxed at once, not just the one you're actively building around.

GODEEPER: Soul Inscriptions, Soulstones, and Resonance III interact in ways that aren't obvious from the achievement text alone. The mechanical breakdown, including which resonance skill each weapon unlocks, is here. Lost Castle 2 Advanced Builds Guide: EN4-5 Meta 2026 →

Companion achievements: recruit and clear with all 6

Each companion achievement needs the same two steps: recruit that companion, then complete a successful adventure with them along.

These sit low mostly because they're rarely a priority, not because recruiting companions is difficult by itself. Treat this as a dedicated cleanup pass: pick one companion per run, build a stable clear around them, and don't stack a companion goal on top of a Nightmare 4-5 attempt where a bad run wastes both.

Camp, economy, and rare cleanup achievements

The remaining ten achievements cover camp upgrades, merchant spending, and a handful of specific in-run conditions.

Dragon Bones Unite is worth reading twice. The developer's own description doesn't stop at the requirement; it adds a one-line joke underneath, "That was a really long detour." I laughed when I found it buried in the raw page source, and it won't show up in most paraphrased achievement lists, since it's easy to trim as filler. If you're the type who reads flavor text, that's the achievement worth checking Steam's own page for directly instead of trusting a summary.

Caption: Camp and economy achievements track passively across ordinary runs like this one, not as a separate grind you have to plan around.

The rarest and most common achievements right now

Static percentages from a guide published months ago go stale fast on a game that's still gaining players post-1.0. Here's what Steam's own tracker shows as of today, not a snapshot from earlier this summer.

Rarest 5: Peak Warrior (3.9%), Soul Burst (4.4%), Consumerism (4.5%), High Cost-Effectiveness (5.4%), Striving for Excellence (9.0%). All five sit in the late-game Soulstone/economy cleanup tier, not in boss difficulty, which says something about where the real completion wall is in this game: it's patience and system mastery, not reflexes.

Most common 5: Adventure Begins (97.9%), Junior Treasure Collector (91.1%), Junior Weapon Collector (89.1%), Intermediate Treasure Collector (86.5%), Brother, Hold On (82.9%). All five happen within the first few hours of normal play without any planning at all.

Caption: Boss and collection achievements both climb fastest during ordinary runs; the late-game Soulstone tier is where progress actually slows down.

Tips for efficient achievement hunting

Don't chase all 85 in one linear order. A few habits make the difference between an efficient cleanup pass and a wasted one:

• Bank easy weapon clears early, before you've committed to one main build. Blademaster and Steam Demolitionist are the two lowest-completion weapon achievements, and both are easier on a low-difficulty clear than retrofitted into a Nightmare 4-5 run.
• Don't chase the 200+ collection tiers on purpose. They climb naturally as you play more varied runs; farming them directly is slower than just playing toward other goals.
• Route Memory Shards and Mage Tower achievements together, since Seek the Truth is a prerequisite for the whole Mage Tower chain, not a separate side quest.
• Save Soulstone and Soul Seal achievements for genuine late-game cleanup. They require systems that only open up after Nia's endgame unlocks, and rushing them before your build is stable wastes runs.
• Pick one companion per run for the recruitment achievements, rather than trying to combine a companion clear with a hard Nightmare push. A stable, familiar build clears faster than an unfamiliar one carrying a companion you haven't built around.

Related Reading

• Lost Castle 2 Builds Guide: All 8 Weapon Types at 1.0: Lost Castle 2 builds guide: all 8 weapon types, how Soul Inscription and Resonance III
• Lost Castle 2 Beginner Guide: Weapons, Build & First Run: Lost Castle 2 beginner guide: pick from 8 weapon types, set Serena's chest odds, mix
• Lost Castle 2 Farming Guide: Gold and Materials Fast: Lost Castle 2 farming guide: best gold-per-run floors, how Inscription shards drop, and the route
• Lost Castle 2 Co-op Guide: All 4 Player Modes Explained: Lost Castle 2 co-op guide: up to 4 players, confirmed directly by Hunter Studio. Online,
• Lost Castle 2 Review: Is the 1.0 Launch Worth It? (2026): Lost Castle 2 review: Hunter Studio's beat-'em-up roguelite hits 1.0 June 11. 700k EA units,

Frequently Asked Questions

How many achievements are in Lost Castle 2? 85. Confirmed three separate ways today: Steam's own community stats page states it directly, the GetGlobalAchievementPercentagesForApp API returns exactly 85 entries, and the store's appdetails API lists achievements.total as 85.

Are Lost Castle 2 achievements split between the base game and DLC? No. Some search results describe a base/DLC split, but that's wrong for this game. Lost Castle 2's only DLC is a $2.99 soundtrack pack with zero Steam achievements. All 85 ship in the base game.

What is the rarest achievement in Lost Castle 2 right now? Peak Warrior, at 3.9% global completion, for activating the resonance of every Soul Seal. Soul Burst (4.4%) and Consumerism (4.5%) are close behind, both tied to late-game economy and fusion systems.

What is the easiest achievement in Lost Castle 2? Adventure Begins, at 97.9% global completion, for entering camp for the first time. It's essentially the game's opening tutorial beat.

How do you unlock Seek the Truth in Lost Castle 2? Collect all 11 Memory Shards across repeated Nightmare 3 runs and confirm them in the camp shard screen. It currently sits at 26% completion, double what it was two months ago as more players find the route.

What does the Peak Showdown achievement actually require? Steam doesn't show its description, and no fan guide documents it either. Its internal ID and matching completion rate point to first entering the Hidden Mage Tower, distinct from the deeper Unknown Realm achievement.

Which weapon achievement is hardest to unlock? Blademaster, for clearing a run with the Katana, at 18% global completion, the lowest of the nine weapon-clear achievements. Katana runs reward precise dodging over raw stats, which filters out casual attempts.

References

• Lost Castle 2 on Steam
• Lost Castle 2 Community achievements stats page (live)
• Lost Castle 2 Achievements Guide (dq7reimagined.com)
• Hunter Studio on X