Swarm Bunker Lust Defense Steam Partner Hotfixes v1.0.1–v1.0.5

After Swarm Bunker: Lust Defense launched on August 3, 2026 (Steam app 4403260), 001Studio-NSFW published a chain of Hotfix Version notes through Steam partner events. Unlike the large Demo V2 and Demo V3 announcements summarized on Patch notes, these hotfixes target polish bugs—blank story backgrounds, audio mix, achievement unlock failures, gallery display, and progression blockers—rather than new stages or heroines.

This page lists v1.0.1 through v1.0.5 exactly as the developer communicated. We do not invent later version numbers. For demo-era milestones and launch framing, start at the Updates Hub and Patch notes.

Pre-launch context — Demo June 14 prep

Before the paid release, a June 14 demo preparation update addressed last-mile issues players hit in the free build (app 4431200). Public notes from that window included:

• UI localization prep — additional interface strings and layout checks ahead of the full game’s ten-language Steam listing, building on French support that arrived during Demo V2.
• Heart double-deduction bug — a defect where bond or life hearts could deduct twice in certain hub flows, sticking story progression until the player restarted or replayed a segment. Demo veterans who lost route flags to this bug should replay affected nights after updating; full-game owners benefit from the same fix lineage carried into launch builds.

If you are tracing a save that feels “stuck” after demo hours, compare your build date against these notes and read Walkthrough for chapter retry guidance.

Hotfix Version v1.0.1

The first post-launch hotfix tackled presentation and difficulty data errors:

• Blank story backgrounds — visual-novel segments sometimes rendered without their intended backdrop art, breaking immersion during bunker dialogue.
• Battle music not looping — combat tracks could end abruptly instead of cycling for long defense nights.
• Incorrect wave data — one stage shipped with wave tables that made the mission excessively difficult relative to designer intent; the hotfix corrected spawn timing and enemy counts for that layout.

Players who abandoned a specific stage thinking their build was under-leveled should retry after v1.0.1—see Walkthrough for gear checks unrelated to the data bug.

Hotfix Version v1.0.2

Audio and gallery systems received the second patch:

• SFX overpowering music — too many simultaneous sound effects lowered effective music volume, making combat feel flat; mixing was adjusted so the score remains audible during dense projectile spam.
• Gallery images displayed incorrectly — unlocked CG thumbnails or full images could appear cropped, offset, or scaled wrong in the collection viewer.

If you unlocked scenes before this fix, revisit the gallery after updating; display corrections do not remove unlock flags. Scene unlock logic is covered on Unlock scenes.

Hotfix Version v1.0.3 — achievements

Achievement tracking was the headline fix:

• Achievements could not be unlocked — Steam integration failed to fire unlock events even when players met listed conditions.
• Retroactive award on restart — the patch re-checked previously completed conditions when you restart the game and awarded achievements you had already earned in-session.

This behavior matters for completionists: if you finished story or defense milestones before v1.0.3, launch the client once after updating and confirm the Steam overlay shows four unlocks. Full guidance lives on Achievements.

Hotfix Version v1.0.4

A lighter content-and-balance pass:

• Some character illustrations — additional or corrected heroine art in hub or story panels (exact slots vary by route; check bond dialogue if portraits looked placeholder).
• Minor stage balance adjustments — small tuning to enemy pressure or economy on select missions without the large wave-data error seen in v1.0.1.

Cross-check Tier List if a formerly brutal stage suddenly feels smoother—it may be intentional rebalance, not player skill.

Hotfix Version v1.0.5

The fifth documented hotfix addressed narrative flow:

• Issue that could prevent story progression — a blocker where certain dialogue flags or chapter transitions failed to advance, leaving players unable to reach the next defense night or hub event until the fix shipped.

If you still hit a hard stop after v1.0.5, verify Steam downloaded the latest build, then report reproduction steps on the developer Discord linked from Wiki. Include whether achievements retro-unlocked from v1.0.3.

How hotfixes relate to demo patch history

Demo V2 and V3 changed content scope—new stages, Nora, turrets, challenge mode experiments. Hotfixes v1.0.1–v1.0.5 change stability and fairness on the paid app. They do not replace the need to read Demo to full release if you are upgrading from the free build.

Related wiki pages

• Patch notes — Demo V2/V3 public notes plus hotfix summary bullets.
• Achievements — Steam unlock behavior and v1.0.3 restart tip.
• Walkthrough — stage flow after wave-data fixes.
• Unlock scenes — gallery and bond gates tied to v1.0.2 display fixes.
• Updates Hub — where new partner events will be linked when published.