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Card Battle (game)

This article is about the two-player card game. For other uses, see Card game.
Card Battle
✦◆★
Players2
Setup timeNone
Play time5-15 min
DeckInfinite (auto-reshuffle)
Starting HP20 per player
Hand size4 cards
GenreSimultaneous action
Contents
  1. Overview
  2. Gameplay
  3. Cards
  4. Surge and overload
  5. Play the game
  6. Strategy

Card Battle is a two-player simultaneous-action card game played on a shared device using a pass-and-play format. Each player maintains a hand of four cards drawn from a shared infinite deck, and both players secretly select one card per round before revealing simultaneously.[1]

The game is notable for its Surge mechanic, which allows players to stack attack multipliers at the risk of triggering an overload — a backfire that redirects damage to the attacker.[2]

Overview

The objective is to reduce the opponent's hit points from 20 to zero. Players choose from six card types each round, balancing offensive, defensive, and tactical options. Because both players reveal simultaneously, the game involves significant bluffing and prediction.

Gameplay

Each round: (1) Player 1 secretly selects a card and confirms; (2) the device is passed to Player 2; (3) both selections are revealed simultaneously; (4) effects resolve and each player draws a replacement card. The deck reshuffles automatically upon depletion. Mutual lethal damage results in a draw.

Cards

SymbolNameEffectBase value
✦StrikeDeals damage, reduced by opponent's shield.4 damage
◆ShieldAbsorbs incoming damage.+5 shield
★HealRestores HP (max 20).+6 HP
▲SurgeStacks a x2 attack multiplier.x2 per stack
◉DrainDeals damage and transfers HP from opponent.3 dmg / +2 HP
◈PierceDeals damage bypassing shield entirely.5 damage

Surge and overload

Surge stacksMultiplierEffect
1x2Next attack deals double damage.
2x4Next attack deals quadruple damage.
3x4 (backfire)⚠ OVERLOAD — attack hits the attacker instead.
⚠
A third Surge without attacking triggers overload. Damage applies to the Surge user. Shield does not mitigate overload damage.

Play the game

Fig. 1 — Playable implementation of Card Battle (pass-and-play, 2 players)

Strategy

  • Shield baiting — delay attack to bait out opponent's Shield before playing Strike.
  • Pierce timing — most valuable when opponent has high shield.
  • Surge management — x4 is optimal; avoid drawing a third Surge.
  • Drain efficiency — doubly effective at low HP differentials.