A world beyond the seals.
Journey through twelve Campaign regions, each with four seal chambers and a guardian. Discover distinct formations, region soundtracks, and the secrets beyond the main route.
A game by Zae’zynthi Studios
Netherglass
Upcoming rebrand: Netherglass is the new name of the game previously released as Dreadglass. Published 0.23.8 packages still show the former name. The next authorized update will preserve compatible installed progress. The Android package identifier and Google Play listing URL stay the same.
Break the seals. Challenge the unknown.
An eldritch brick-breaker roguelite for Android. Turn precise rebounds into impossible builds as you descend through a world of living glass and ancient powers.
Playtest · 0.23.8
Your light reaches five regions.
Twenty-five Campaign encounters. No ads. No purchases.
Compatible updates preserve local progress while the same app and its data remain installed. Keep the app installed; uninstalling or clearing its data can erase saves.
For ARM64 devices running Android 7.0 or later.
Difficulty progression: clear Region V on Standard to unlock Challenging, then clear it on Challenging to unlock Netherglass. Sequential difficulty unlocks are included in the current playtest.
Inside the descent
Every rebound changes the run.
Power takes many forms.
Harness Zap, Metal, Freeze, Inferno, Venom, and more. Combine relics into Divinity and Eldritch gifts, while building the permanent upgrades that shape your next attempt. Read the ability guide.
Master the confrontation.
Take on three Boss Rush gauntlets with their own progression, rewards, and mastery goals. Learn the patterns. Find the opening. Earn the victory.
Current source preview · 30 seconds
A light worth fighting for.
Explore the menus, shape a build, and face The Drowned Choir and The Timeless Tyrant.
Native Godot footage with original game music and effects. These edited excerpts use illustrative earned loadouts and stay within the first five Campaign regions. No Super Boss or secret-boss fight is shown. The upcoming Netherglass source is pictured; currently published 0.23.8 packages retain the earlier display name.
Actual gameplay · 12 seconds
One build. Five regions.
Lightning becomes ice. Frost Arc shapes the fight.
Five combat excerpts show an illustrative build using the updated coating rules, shared damage budgets, and rewards every two chambers. The sequence ends at the fifth region’s boss with Frost Arc II.
- Find the spark. Arc begins the run; Frost and Overload develop its lightning and ice options.
- Grow the chorus. Resonance adds Echo support while later boss rewards develop your control powers. Each ball keeps one offensive coating.
- Make it divine. After region III, the fourth chamber of Region IV can offer Frost Arc. Its second rank can arrive after Region V’s fourth chamber. Eldritch upgrades require later fusion opportunities.
This is a possible fourteen-choice draft, not a guaranteed reward sequence. Clips are edited excerpts, not the full time needed to finish five regions. Re-recorded from the upcoming Netherglass source with the current coating limits, damage sharing, rank caps and fourth-chamber fusion rules. Published 0.23.8 packages use the earlier rules; the ability guide identifies upcoming changes. Video starts muted; use its controls for the original game audio.
Know the threat
Every guardian has a face.
Textured creatures, readable warnings, and room to find your opening.
Read your power
A different kind of impact.
Living lightning. Cold steel. A spreading green venom.
Zap chains. Freeze stops a boss until Shatter. Metal pierces seals. Inferno burns a cross. Venom spreads, Gravity steers, Echo marks, Magnet catches, and Damage strengthens every ball-damage effect.
Base ball powers last six flight seconds; Zap, Freeze and Inferno can be consumed on impact. Held time pauses their budget. The upcoming Split update inherits remaining power time, produces two balls (four with Chaos), and preserves fractional damage. Extra balls remain until lost; published 0.23.8 still uses the prior Split rules. Overload doubles Zap damage.
Small, Medium or Large text, default 60 FPS, a 30 FPS option, and Reduced Motion let you choose your presentation. Timed powers and game speed stay consistent.
Read your build
Power with a clear identity.
Boss-earned Greater Blessings use ice-blue crown borders; Divinity uses gold crystal etching and Eldritch uses amethyst eyes. These upcoming-build images compare tier styling; the tiers come from different reward pools. Boss rewards contain Greater Blessings, while eligible fusions appear after a region’s fourth numbered chamber. The larger gold Reroll Gifts button sits below the choices. Choose Small, Medium or Large text in Settings or Pause; Small is the default.
Next update preview: View the new Gift-ban screens. Region V Shrine training adds run-only Campaign bans beneath Reroll. Fourth-chamber fusions, Greater-only boss rewards and separate Rush build steps are also planned.
Beyond the last seal · Secret encounter spoilers
A glimpse of the Eternal Nightmare.
Six seconds inside Zae’zynthi’s second phase.
Play the 6-second Phase II video
Reveal Zae’zynthi, the Eternal Nightmare · Phase II gameplay
The glass moves. The eye follows.
In this actual phase-two capture, glass shifts to the frontline while four Cultist Seals occupy the boss’s corners. Shatter the defenses, collect the drops, and return the ball.
Defeating these Cultists grants Dread Fury: +100% ball-contact damage, with six flight seconds added per kill. Its duration stacks; its damage bonus does not.
The clip contains gameplay and original music, with no spoken dialogue. It starts muted and plays only when you choose. Open the MP4 directly.
From inside the glass
A glimpse of the journey.
Your light. Your choice.
Five-region playtest available: play through Encounter 25 without ads, ad offers or purchases. The usual reward screen appears before a thank-you message and optional glimpse of later content. Included regions remain replayable.
Future commercial free-to-try model: an optional US$4.99 one-time in-app purchase is planned for full-game access, with localized Play pricing and normal gameplay milestones. Full-game owners will be ad-free. Eligible free players may choose a rewarded Campaign retry after defeat or a Memory bonus after final rewards. Skipping keeps normal rewards; no automatic combat interruptions, subscriptions or energy timers are planned. The commercial free-content limit will be confirmed with that release.
Current playtest builds: the 0.23.8-playtest APK / code 65 and Play bundle / code 66 contain the five-region playtest. Historical 0.22.0 / code 48 and 0.21.5 / code 47 full offline builds remain separate. The Play bundle includes optional Update / Later prompts, background downloading and a menu restart after saving; direct APK updates remain manual. Commercial purchase/ad services are not active. No advertising, billing or analytics SDK is active. A purchase is not currently available in these builds.
Progress is local. Updates installed over a compatible build are designed to keep it while Netherglass and its app data remain installed. Uninstalling or clearing app data removes local progress; there is no studio cloud save. Future purchase restoration would restore the license, not a save. See the build-specific privacy policy for actual processing, future SDK plans and your choices.