[BOUNTY #266] Secondary Extraction Shooter Gamemode — Complete Design Document

[johneapen80]

Bounty #266: Extraction Shooter Gamemode — BREACH & EXTRACT

This PR delivers a comprehensive design document for a secondary extraction shooter gamemode for /tg/station.

What's Included (14 Sections):

1. Executive Overview — Vision, core loop, design pillars
2. Gamemode Architecture — Round structure, player counts, 4-role squad composition
3. Maps & Environments — 3 launch maps (Derelict Icarus, Syndicate Hades, Cargo Nexus) with unique threats and features
4. Weapon Ecosystem — 5-tier rarity system, 4 new extraction-specific weapons, full modding system
5. Enemies (PvE) — Xenomorph hierarchy, Syndicate forces, automated threats with reactive AI
6. Extraction Mechanics — Multi-point extraction, risk/reward timing, defense sequences
7. Economy & Progression — Persistent stash, trader system, faction reputation
8. Squad Communication — Radio channels, SS13-adapted ping system
9. Godot-to-BYOND Compatibility Layer — WebSocket rendering bridge architecture
10. Soundtrack Design Brief — 4 audio layers, 7 track concepts with style references
11. SS13 Integration — Shared systems, new TGUI interfaces, round transitions
12. Balance & Fairness — Gear score matchmaking, death recovery, anti-griefing
13. Development Roadmap — 4-phase plan over 6 months
14. Concept Image Descriptions — 4 scene descriptions for visual concept art

Closes #266

[Howluinb]

Could you possibly generate a visual mockup of what such a gamemode would look like in practice? I think it'd really spice up your design doc!