Panzer Dragoon remake by Claude Opus 5.5 Ultracode in 20 hours (X video, Japanese)
野生の男 (@yasei_no_otoko) · 2026-09-26 · ai-made · 366,437 views
Made by AI
Model: Claude Opus 5.5 · Series: Agent-built game or 3D world (the video shows the result)
Evidence: X post (2026-09-26): 'あのすみません…Claude Opus 5.5 Ultracodeで5時間制限に3回引っ掛かりながら20時間でパンツァードラグーンを再現してもらったらとてつもないものが出力されたんですが…使用量がリセットされたらGPT-6 Astra Ultraでも試そうと思います…😇'
Human role: About 20 hours of work, hitting the 5-hour usage limit three times, per the creator.
Pipeline: Opus 5.5 Ultracode → WebGL rail shooter
What's in the video
Description written by Gemini, which watched and listened to the whole video.
Summary
This video showcases a complete, playable Episode 1 rail-shooter demo titled 竜騎の空 (Ryuki no Sora), created as an homage to the Sega Saturn classic Panzer Dragoon and developed using WebGL/Three.js via Claude Opus 5.5 Ultracode in approximately 20 hours. Presented by developer @yasei_no_otoko on X, the clip demonstrates a full playthrough of "Episode 1: The Drowned City," featuring 360-degree radar switching, lock-on homing laser combat, environmental navigation, and an end-of-stage serpent boss fight concluding in an S-rank victory.
What is shown
- [00:00]: Title screen for 竜騎の空 (Ryuki no Sora) - Episode 1: 沈みし古都, noting "AN ORIGINAL HOMAGE / WEBGL / THREE.JS" with control mappings for mouse aiming, shooting, lock-on, and 90°/180° camera rotation.
- [00:04]: Cinematic intro displaying stage title EPISODE 1: 沈みし古都 / THE DROWNED CITY as an armored dragon and rider fly across open water flanked by sunken classical architecture.
- [00:10] - [00:44]: Gameplay combat showing HUD with dragon health (100), lock-on laser meters, score counter, radar compass, and reticle locking onto swarms of flying bio-mechanical enemies.
- [00:19], [00:32], [00:57]: Dynamic 90-degree and 180-degree view shifts (Left, Right, Back) tracking enemy waves approaching from different quadrants.
- [00:45]: Transition into 遺跡群 / THE SUNKEN COLONNADE, weaving through shattered stone aqueducts and arches while destroying targets.
- [01:23]: Dragon navigates into a narrow urban canal zone titled 水没都市 / THE DROWNED CITY, evading fire and passing beneath grand architectural bridges.
- [01:42]: Environmental prompt 大門を抜けろ / THROUGH THE GREAT GATE as the player maneuvers through an archway back into the open sea.
- [02:03] - [02:31]: Boss encounter against 深淵の番人 / THE ABYSSAL WARDEN, an enormous segmented mechanical sea serpent; at [02:22], an alert indicates 冠が割れた 核を狙え / THE CROWN CRACKS - STRIKE THE CORE, allowing the player to target the exposed core until the boss violently detonates.
- [02:38]: Episode 1 Clear summary screen tallies: Shot Down Ratio (97%), Enemies Down (156 / 161), Score (32,120), Damage Taken (54), Continues (0), and final Rank: S.
Claims & numbers
- The video's title and description claim the game was developed by Claude Opus 5.5 Ultracode within 20 hours.
- Game results screen tallies: 97% shot down ratio, 156/161 enemies eliminated, score of 32,120, 54 damage taken, 0 continues, resulting in an "S" rank [02:41].
Notable quotes
- [00:45]: "遺跡群 / THE SUNKEN COLONNADE" (on-screen location text)
- [01:58]: "...海が騒いでいる" ("...The sea is turbulent", on-screen warning text)
- [02:22]: "冠が割れた 核を狙え / THE CROWN CRACKS - STRIKE THE CORE" (boss battle prompt)
Assessment
This is a real gameplay demonstration of an indie WebGL/Three.js tech demo created with AI coding assistance. The footage shows a fully functional rail-shooter pipeline operating smoothly in real time without apparent cuts or post-processed rendering tricks.
Lyrics & themes
The audio is entirely instrumental. It features an atmospheric, neoclassical orchestral soundtrack with synthesized percussion and strings characteristic of 1990s rail shooters, layered with game sound effects including laser discharges, lock-on pings, explosion bursts, and creature roars.
Lore & references
The project is a direct homage to Sega's 1995 rail shooter Panzer Dragoon, replicating core franchise signatures:
- An armored two-winged dragon guided by a robed rider.
- Multi-target homing lock-on lasers paired with direct rapid-fire blasters.
- A 360-degree radar compass dividing encounters into four cardinal views (Front, Right, Back, Left).
- Episode 1 set in a flooded ruin city and a multi-segmented serpentine aquatic leviathan boss fight.
Visual style & craft
The demo runs in WebGL utilizing Three.js, blending stylized low-poly 3D models reminiscent of mid-1990s 32-bit hardware with modern rendering techniques, including dynamic water surface shaders, real-time lighting, atmospheric haze, bloom, and 2D billboard particle explosion effects. Clean HUD overlays and responsive camera transitions suggest strong human art direction and game loop structuring around Claude-generated scripts.
Described by gemini-3.8-flash on 2026-10-05 from the video's audio and frames.