回线：BACKTRACE vs Vein

子弹不会在去程造成伤害。真正的攻击，发生在它沿原轨迹归来时。 BACKTRACE / 回线是一款围绕“返程弹道”构筑的俯视角动作 roguelite。你只有六枚不会消耗的弹丸：把它们射向墙面，利用反弹布置未来的杀伤线；引诱敌人进入轨迹；在正确时机召回；最后赶回旧射击点，接住归来的弹丸并维持战斗节奏。 核心特色： - 独特的返程伤害机制：去程布线，返程穿透敌群； - 六枚永久弹丸：每次发射都同时创造弹道与必须返回的锚点； - 主动召回、相位冲刺、反弹、标记和接弹组成高密度战术循环； - 五波完整单局、四类敌人和多阶段 Boss“收债人”； - 九项围绕返程、反弹和接弹设计的局内升级； - 为 iPhone 与 iPad 横屏设计的双虚拟摇杆和快捷按钮； - 离线单机、无广告、无应用内购买； - 降低闪光、关闭震动、瞄准辅助和色觉符号等辅助选项。 先决定子弹将如何回来，再决定自己要去哪里。

The tunnels you dig become the battlefield. The ecosystem you grow becomes your defense. Vein is an ecosystem-driven roguelike defense game. Excavate an underground dungeon, raise autonomous creatures, and stop invading squads from carrying your Dungeon Core back to the surface. BUILD A LIVING DUNGEON Dig new routes, connect the Core to magic walls, and shape a habitat where creatures feed, move, grow, and fight according to their own behavior. DEFEND THE CORE Read each invading squad's roles and classes, then use terrain, creatures, facilities, and carefully timed interventions to break their route to the Core. EVOLVE EVERY RUN Choose one of three upgrades when your dungeon levels up. Strengthen creatures, expand the magic vein, improve the environment, and create a different strategy each run. EXPLORE A COMPLETE CAMPAIGN Fight through 12 distinct locations, 36 stages, and 108 assaults. Settle your run, carry earned DP forward, summon creature cards, and begin the next dungeon with new possibilities. FEATURES • Real-time ecosystem and dungeon defense • Route-shaping excavation and Core placement • Creatures with different needs, movement, and combat behavior • Invaders with distinct roles, classes, and priorities • Three-choice roguelike upgrades • Creature codex, rare forms, awakening, and summons • Pixel-art worlds that change from surface to underground Dig deeper. Grow stronger. Do not let them take the Core.