轨道射击 机甲 健康 16-Bit 死亡 火 科幻 徒手对抗 射击 Steam 多主人公 成就 像素艺术 dice 平台动作 level selection flamethrower BOSS 战 树木 爆炸 多个 BOSS 数字发行 升级 train 查看全部 + rail track 跳跃 sprite boss rush 男主人公 flying enemies credits menu option 箱子 随机数生成 bullet 角色可选择 调色板转换 fireball rope cow turret explosives 武器可升级 变身 BOSS 枪 interactive title screen item throw 虚拟平台 bubble 过场动画 fake in-game advertising propeller 合作游玩 gem street light barrel 准星 抬头数字显示仪 Game Over sound test fusion 非强制 BOSS 困难关卡 小 BOSS multi-phase boss multiple gameplay types low health warning 激光 mustache facial hair asymmetric co-op multiple gameplay perspectives liberation spotlight exploding barrel violent plants enemy health indicator falling sequence exclamation mark punctuation mark above head sega channel power line recurring boss dialogue portraits Xbox 向后兼容 evil laugh 自动滚动关卡 onlive slope sliding boss pattern enemy tossing 竞争合作 segmented creature asteroid go arrow spam giant enemy crab stock up area more than 100% health run 'n gun continue joke character boss killing their henchmen dithering rapid fire rail shooting segment 并行滚动 buddy throw homing projectile record breakers codependent unlimited revival seven force pinky roader flying battleship black beat stepper core guard system black fly pink lobster duck battalion