Known Features

This is an implementation-backed feature inventory, not a roadmap.

Gameplay

Endless Classic wave survival with Easy, Medium, Hard, and Adaptive difficulties.
Tutorial with paused steps, unlimited training health/stamina, progressive enemy introductions, and practice arsenal access.
Eight maps, selectable atmosphere, random map selection, automatic weather, and continuous day/night cycle.
Score-gated eight-slot arsenal, headshots, ADS, recoil, reloads, shell ejection, rocket splash damage, and weapon inspect.
Stamina-limited sprint, jump, crouch, collision/wall sliding, cover, barrel hazards, Sentinel turrets, combos, and killstreaks.
One-slot loot powers, killstreak airdrops, rare Nukes, skill modifiers, solo Mystery Box perks, and generated Classic run modifiers.
ARK-07 relay network: several per-map radiation-field spires that overclock nearby enemies with a damage/speed/self-repair charge that lingers well after they leave the field, jam the player's held equipment, and pay bonus score for field kills; plus random, difficulty-scaled Overdrive Surge (EMP-triggered, buffed/red-eyed wave) and Null Wave (corrupted, screen-glitching wave) modifiers.

Eight classes with active abilities, passives, class shadow silhouettes, and multiplayer replicas.
Normal, Fast, Tank, Sniper, Boss, and Revenant moving enemies.
Crowned Elite Tanks, Boss enrage/summons/blinks, Revenant shields/blinks/regen, and Subverter hacking interactions.
Perception, pursuit lanes, surround behavior, patrol/investigate states, line of sight, ranged kiting, melee telegraphs, bullet dodging, obstacle avoidance, and predictive spawn scoring.
Enemy pooling, shared materials, terrain spatial hash, high/medium/low/cull LOD, and distance-gated shadow casting.

Persistent account auth, username/password flow, profile customization, privacy controls, leaderboard opt-out, password change, and full account deletion.
Solo/multiplayer stat tracking, difficulty-weighted rank XP, skill points, nine skill upgrades, 28 achievements, and achievement titles.
Per-weapon L0–L10 mastery with persistent XP, reload/recoil/magazine benefits.
UTC daily challenges with claimable skill-point reward.
Procedural mission cards and combat-coach tips.
Photo Mode with filters/adjustments and cloud-saved images under a per-player cap.

PeerJS lobby creation/joining, host kick, name collision rejection, heartbeat timeout handling, and optional time limits.
Host-authoritative shared enemy world, host-synchronized waves, guest hit reporting, kill credit, targeted enemy-damage messages, and host-authoritative ARK-07 relay placement/wave-modifier sync.
Timestamped player/enemy snapshots, interpolation, short packet-loss extrapolation, and teleporter-buffer resets.
Remote character models, weapon poses, crouch/aim animation, health bars, nameplates, scoreboard, chat, emotes, minimap, spectators, and result screens.

Responsive desktop and touch HUD, dynamic crosshair, hit markers, kill feed, damage direction, minimap, and mobile orientation gate.
Rebindable keyboard controls, settings persistence/sync, haptics, colorblind filters, frame caps, hardware auto-detect, and graphics presets/custom mix.
Procedural Web Audio weapon and combat effects, plus bundled menu music.
Shader warmup, custom sky/haze, HDR environment lighting, weather particles, procedural terrain materials, HDR post-processing, photo filters, particles, impact effects, and relay-interference/signal-glitch screen effects.
Optional Rapier solo ragdolls with lightweight fallback.

For numeric details and behavior caveats, use the linked system pages rather than treating this overview as the sole specification.