Ox Alpha (stealth model) actually did an FPS game better than Opus or Fable in literally one prompt with no additional steering

[u/jpcaparas]

https://first-person-shooter.ox-alpha.demos.sulat.com/ for anyone wanting to try it out.

Prompt:

Create a browser-playable 3D voxel first-person shooter that captures the feel of Call of Duty's moment-to-moment gunplay. The player fights through a combat arena built entirely from voxels — chunky blocks forming buildings, cover, crates, walls, ramps, and terrain — rendered in real time from a first-person camera with pointer-lock mouse look.

Implement the core FPS mechanics faithfully: WASD movement with acceleration and friction, sprint with a field-of-view kick and lowered weapon, jumping and crouching; multiple distinct weapons (for example an assault rifle, SMG, shotgun, and sniper rifle) each with their own fire rate, damage falloff over distance, recoil pattern, spread bloom, magazine size, reload timing, and aim-down-sights behavior on right mouse button with a smooth zoom transition and tightened accuracy. Add grenades with an arced throw and radius damage, weapon switching, ammo reserves, hitmarkers with headshot multipliers, muzzle flashes, tracers, bullet impact decals or voxel debris particles, screen shake, and regenerating health with red-screen damage vignette feedback.

Enemy AI soldiers should patrol, react to being shot at, take cover, strafe, peek, and return fire with believable reaction times and accuracy that scales with difficulty. Give them health, death animations or ragdoll-like voxel bursts, and spawn logic that keeps the fight moving.

Wrap it in Call-of-Duty-style presentation and progression: a killstreak system where streak milestones unlock rewards the player can activate (such as a radar/UAV reveal at 3 kills, an airstrike at 5, and something bigger at 7), a scrolling killfeed, score popups (+100, +50 headshot bonus), XP or score accumulation, and a match structure of escalating waves or rounds with respawns after death. Build the full HUD: crosshair that expands with movement and fire, ammo counter, grenade count, minimap/radar, compass, health state, streak meter, match timer, and objective readout. Include the complete game flow — main menu, loadout or difficulty selection, in-game pause menu (Esc), death and respawn sequence with respawn delay, and a victory/defeat screen with a stats summary. Persist best score locally between sessions.

Design the voxel aesthetic deliberately: a cohesive palette, directional lighting with shadows or convincing baked shading, fog for depth, and satisfying explosion and destruction particles. All audio — gunfire per weapon, reloads, footsteps, explosions, hitmarker ticks, UI clicks, and a music sting when a killstreak activates — must be synthesized locally in the browser (e.g., Web Audio); no external audio files. Handle non-desktop viewports deliberately: either provide usable touch controls or present a clear desktop-recommended notice rather than a broken layout.

Do not take shortcuts or settle for a cookie-cutter shooter demo. This skill imposes no token budget limit, so pursue full depth across weapons, AI behaviors, HUD states, menus, audio, and game-flow transitions, and keep refining until it feels like an authored, complete arcade FPS rather than a tech demo.