← Geodesic Nexus NEXUS — GDD v0.1
Game Design Document v0.1

NEXUS

A digital trading card game built on spatial strategy, hidden information, and simultaneous decision-making

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01

The Vision

Every decision matters. Every card could be a trap. Every position tells a story.

Chess meets poker meets Magic

NEXUS is a digital TCG where spatial positioning, hidden information, and simultaneous planning create a strategy game where the best mind wins — not the biggest wallet.

Design Pillar

Skill Expression Over Collection

The outcome of every game should be determined primarily by player decisions, not deck cost. Positioning, timing, reads, and adaptation are the currencies of victory.

Design Pillar

Perfect Information is a Lie

Players never have complete knowledge of the board state. Face-down cards, delayed effects, and simultaneous play create a fog of war that rewards intuition and pattern recognition.

Design Pillar

No Two Games Feel the Same

The hex grid, simultaneous planning, and Veil system mean that even mirror matches play out completely differently. Emergent complexity from simple rules.

Design Pillar

Respect the Player's Time

Games last 10–15 minutes. No 40-minute slogs. Fast simultaneous turns, clean win conditions, and comeback mechanics prevent blowouts from dragging on.

Core Fantasy

You are the Strategist

The feeling we're engineering: you see the opponent's formation and instantly understand three possible plays they could be setting up. You lay a face-down Echo in the perfect hex, set your Construct formation to bait the attack, and wait. When they commit — you reveal. The board flips. That moment of "I read you perfectly" is the addictive core of NEXUS.

02

Core Game Loop

The fundamental cycle every player experiences each game.

Draw Gain Flux Plan (Simultaneous) Resolve (Priority) Cascade Score
How It Works

Simultaneous Planning → Sequential Resolution

Each turn, both players secretly queue their actions: deploy cards, move Constructs, trigger abilities, play Shifts. Once both players lock in, actions resolve in Priority Order (determined by card speed values and position).

This is the heart of NEXUS. You're not just playing your cards — you're predicting what your opponent will do and positioning yourself to counter it. Every decision is a bet on your read of their mind.

Win Condition — Primary

Shatter the Nexus

Each player's Nexus starts at 20 integrity. When a Construct deals damage to a hex adjacent to the Nexus and no defender blocks, the Nexus takes damage. Reach 0 → you win.

Win Condition — Alternate

Paradigm Lock

Control 3 Paradigms simultaneously on the board. This represents such total strategic dominance that the opponent's game plan collapses. Rare, hard to achieve, but rewards control-style play.

03

Resource System — Flux

No mana screw. No free plays. A resource system that rewards skill.

Flux = Round Number + Board State

Both players always have equal base resources. The skill is in how you generate, spend, and deny Flux through board position and card interactions.

Base Rule

Guaranteed Scaling

On Round 1, both players gain 1 Flux. Round 2 → 2 Flux. Round 3 → 3 Flux. This continues up to a cap of 8 Flux per turn. This solves Magic's mana screw problem entirely — both players always have a known baseline of resources.

But here's where it gets interesting: the baseline is just the floor. Cards, positions, and abilities generate bonus Flux, creating asymmetric resource advantages that are earned, not drawn.

Flux Generation

Board-State Flux

Certain hexes on the board are Flux Wells — control a Construct on a Flux Well and gain +1 Flux per turn. Some Constructs passively generate Flux. Some Paradigms modify Flux rates globally. Resource advantage is fought for on the board, not drawn from your deck.

Flux Denial

Disruption Economy

Destroying an opponent's Flux-generating Construct or contesting a Flux Well cuts their economy. Certain Shifts can temporarily drain Flux. The Void spectrum specializes in resource denial — starving the opponent is a legitimate win strategy.

Why This Works

Solving Both Problems

vs. Magic: No random mana draw. No games lost because you drew 4 lands in a row. The base Flux guarantees you can always play the game.

vs. Yu-Gi-Oh: No free-cost degeneracy. Every card costs Flux, preventing the "play your entire hand turn 1" problem. Resources scale with the game, creating natural early/mid/late phases.

04

The Hex Board

Position is everything. The battlefield adds a spatial dimension no other TCG has.

PLAYER 2 TERRITORY
N2
◈FW
◈FW
◈FW
◈FW
◈FW
N1
PLAYER 1 TERRITORY
Your Constructs
Enemy Constructs
Nexus
Flux Wells
Board Dimensions

5-Column Hex Grid

The board is a compact 5-wide, 5-deep hexagonal grid (approx. 25 hexes per player's territory, ~19 contested hexes including the midfield). Each player's Nexus sits in their back row. Flux Wells are positioned symmetrically in contested zones.

Compact enough for fast games, deep enough for real positional play. Every hex matters.

Spatial Mechanics

Adjacency is Power

Adjacent Constructs can support each other — some abilities only trigger when allies are in neighboring hexes. Flanking (attacking from multiple angles) deals bonus damage. Blocking requires physical position between attacker and target. The board turns every combat into a puzzle.

Why Hex

Six Neighbors, Infinite Plays

Hexagons have 6 adjacent tiles vs. a square grid's 4 (or 8 with diagonals). This creates more meaningful positioning decisions, eliminates diagonal weirdness, and looks gorgeous when animated. Every Construct placement considers 6 possible interaction points — this is where "strategic mastermind" lives.

05

Card Types

Four card types, each serving a distinct strategic role.

Constructs
Permanent entities placed on the grid. They have Power, Armor, Speed, and abilities. They attack, defend, generate Flux, and control territory. The backbone of any strategy.
≈ Creatures / Monsters
Shifts
Instant effects that resolve during the action phase. Move Constructs, deal damage, buff allies, disrupt plans. They can be played during planning phase to execute on resolution. Fast, reactive, tactical.
≈ Instants / Spell Cards
Paradigms
Ongoing rule-changing effects attached to a hex. "All Constructs in this row gain +1 Power." "Flux Wells in your territory generate double." They warp the game around themselves. Control 3 and you win.
≈ Enchantments / Field Spells
Echoes
Delayed-trigger effects. Play them face-down on a hex — they activate when a condition is met (an enemy enters, a Construct dies, a Paradigm resolves). The ultimate mind-game card. Your opponent knows it's there, but not what it does.
≈ Trap Cards / Flash Enchantments
Card Anatomy

Every Card Has:

Flux Cost Speed Value Spectrum Alignment Rarity Tier

Constructs additionally have: Power Armor Range (1 hex = melee, 2+ = ranged)

Speed determines resolution order during simultaneous turns. Higher speed resolves first. Ties broken by board position (closer to center resolves first). This creates deep drafting decisions — do you want a powerful card or a fast card?

06

The Five Spectra

Factions defined by philosophy, not just color. Each plays fundamentally differently.

🔥
CRIMSON
"Momentum is unstoppable"
Aggression. Speed. Overwhelming force. Crimson Constructs are fast and hit hard but shatter easily. Crimson wins by ending games before they start.
🌊
AZURE
"Knowledge is control"
Information. Manipulation. Foresight. Azure reveals opponent's Veiled cards, reorders resolution priority, and controls the tempo. Wins by knowing everything.
🛡
AMBER
"The fortress endures"
Defense. Fortification. Inevitability. Amber Constructs have massive Armor, heal, and generate Flux passively. Wins by outlasting and grinding down.
🕳
VOID
"What you don't have can't save you"
Denial. Disruption. Sacrifice. Void drains Flux, destroys cards in hand, and forces painful choices. Wins by leaving the opponent with nothing.
🌿
VERDANT
"Growth compounds"
Scaling. Synergy. Evolution. Verdant Constructs start weak but grow each turn. Tokens, buffs, and compound effects. Wins by creating an unstoppable engine.
Spectrum Tuning

Hybrid Decks via Adjacent Spectra

Spectra form a ring: Crimson ↔ Verdant ↔ Azure ↔ Void ↔ Amber ↔ Crimson. Cards from adjacent Spectra can be included in your deck at +1 Flux cost. Cards from non-adjacent Spectra cost +3 Flux. This means every Spectrum has two natural allies and two that are difficult to pair, creating 10 distinct two-Spectrum archetypes.

This is cleaner than Magic's 5-color system (no mana fixing lottery) and deeper than Yu-Gi-Oh's attribute system (which barely matters mechanically).

07

The Veil System

The hidden information layer that makes NEXUS a mind game.

Any card can be played face-down

Face-down cards cost 1 less Flux but exist in a veiled state. They must be Manifested (flipped face-up) before they can act. This creates bluffing, reads, and trap plays.

Veiled Constructs

Schrödinger's Threat

A Veiled Construct sits on the board as a mysterious entity. Your opponent knows something is there but not what. It could be a 1-cost bluff or a devastating 7-cost bomb. Manifesting costs 1 Flux and happens at the speed of the underlying card.

This means cheap cards become threatening (because they might not be cheap) and expensive cards become playable earlier (because Veiling discounts them).

Veiled Echoes

The Perfect Trap

Echoes are designed to be Veiled. A Veiled Echo on a hex is a land mine — it triggers automatically when its condition is met, manifesting and resolving in one step. Your opponent must choose: walk into the potential trap, or waste resources routing around what might be nothing.

Counterplay

Reading and Revealing

The Azure Spectrum specializes in piercing the Veil — abilities that reveal face-down cards, force early manifestation, or peek at Veiled entities. Certain Shifts can reveal all Veiled cards in a row or column. This creates a meta-game: Veil-heavy decks are powerful but vulnerable to Azure tech.

At the highest level, experienced players track Flux expenditure to narrow down what a Veiled card could be. If your opponent Veiled something on Turn 2 when they had 2 Flux, it cost at most 3 (2 Flux + 1 discount). That eliminates most of their deck. This kind of deductive reasoning is the "strategic mastermind" fantasy in action.

08

Turn Structure

Simultaneous planning eliminates first-turn advantage and doubles the mind games.

1
UPKEEP
Both players draw 1 card. Gain Flux equal to round number (+ bonuses). Ongoing effects tick. Automatic — no decisions.
2
PLANNING
Both players simultaneously (and secretly) queue their actions: deploy, move, attack targets, play Shifts, set Echoes. 45-second timer.
3
RESOLVE
Queued actions execute in Speed order. Highest speed first. Ties → closer to board center. Echoes trigger as conditions are met. Animations play.
4
CASCADE
Triggered effects chain. Destroyed Constructs proc death effects. Paradigms check their conditions. Damage resolves to Nexus. Board state finalizes.
Critical Design Choice

Why Simultaneous?

In Magic and Yu-Gi-Oh, going first is a massive advantage. In Yu-Gi-Oh specifically, the first player often builds an unbreakable board before the opponent plays a single card. NEXUS eliminates this entirely.

Both players act at the same time. If you deploy a Construct to hex C3, and your opponent plays a Shift targeting C3, both resolve based on Speed — maybe your Construct lands first and tanks the hit, maybe the Shift clears the hex before arrival. You had to predict it. They had to predict you.

This turns every single turn into a poker hand. The planning phase is where games are won and lost.

Timer Design

45 Seconds to Think

The planning phase has a 45-second timer (with a small reserve bank of 90 seconds for the entire match for complex turns). This keeps games fast — a typical game of NEXUS lasts 8-12 rounds, which at ~60 seconds per round means 10-15 minute games. Ranked matches never drag.

09

vs. The Competition

Why NEXUS solves the problems that have plagued TCGs for decades.

Problem Magic: The Gathering Yu-Gi-Oh! NEXUS
Resource System Mana screw/flood No cost = degenerate combos Flux: guaranteed + earned
First Turn Advantage Moderate (draw step skip) Extreme (build unbreakable boards) None (simultaneous play)
Game Length 15-45 min (format dependent) 5-20 min (high variance) 10-15 min (consistent)
Spatial Strategy None Minimal (zones) Core mechanic (hex grid)
Hidden Information Hand only Face-down traps (limited) Veil system (any card)
Skill Ceiling Very high Combo knowledge heavy Reads + position + timing
New Player Experience Complex rules + expensive Combo soup overwhelming Simple rules, deep mastery
Digital-Native Arena is a port Master Duel is a port Built for digital from day 1
The NEXUS Advantage

Digital-First Design

Magic and Yu-Gi-Oh were designed for physical cards, then awkwardly ported to digital. NEXUS is built digital-first, which enables mechanics that physical cards can't support: simultaneous hidden planning, real-time hex-grid positioning, automatic trigger cascades, fog-of-war Veil states, and seamless cross-platform play.

This isn't a card game that happens to be on a screen. It's a strategy game that uses cards as its interface.