Light Up
Objective
Place light bulbs in the grid so that every blank square is illuminated. A light bulb lights up its own square plus every square in the same row and column, until the light hits a black wall square. Light bulbs may not illuminate each other — no two bulbs can be in the same row or column without a wall between them. Each numbered wall square must be orthogonally adjacent to exactly that many bulbs.
Controls
- Click a blank square to place a light bulb. Click again to remove it.
- Right-click a blank square to place a dot marker, indicating you think there is no bulb there. Right-click again to remove the dot.
Bridges
Objective
Draw horizontal or vertical bridges to connect all the islands into a single network. Each bridge can be single or double. Bridges may not cross each other. The number on each island tells you exactly how many bridge ends connect to that island (a double bridge counts as two). Loops of bridges are allowed.
Controls
- Click and drag from an island towards another island in any of the four directions to build a single bridge. Drag the same way again to upgrade to a double bridge. Drag a third time to remove the bridge.
- Click an island (without dragging) to mark it as completed once all its bridges are placed.
Untangle
Objective
Move the points around the board so that none of the lines connecting them cross each other. The graph starts tangled — your task is to untangle it into a planar layout.
Controls
- Click and drag any point to move it. The connected lines will follow.
Cube
Objective
Roll a cube (or other polyhedron) around a grid to collect all the blue squares onto its faces at the same time. Every time you roll, the grid square you leave and the cube face that touches down swap colours. A blank cube face rolling onto a blue square picks it up, but a blue face rolling onto a blank square puts the blue colour back down. Try to collect all blue squares simultaneously in as few moves as possible.
Controls
- Arrow keys — roll the cube up, down, left, or right.
- Click on the grid where you want the cube to roll towards.
- Type menu — switch to other regular solids (tetrahedron, octahedron, etc.) for a greater challenge.
Undead
Objective
Fill every non-mirror square in the grid with one of three monsters: ghosts, vampires, or zombies. The numbers around the edges of the grid tell you how many monsters are visible along that row or column when looking straight into the grid. Visibility rules:
- Zombies are always visible.
- Ghosts are only visible when reflected in at least one mirror.
- Vampires are only visible when not reflected in any mirror.
Controls
- Click a square to select it, then click a monster icon at the top (or press G for ghost, V for vampire, Z for zombie) to place it.
- Backspace — erase the monster in the selected square.
- Right-click a square and type a letter to add or remove a pencil mark, indicating what you think might go there.
- Left-click a clue number to mark it as done (grey it out). Click again to unmark.
点灯（Light Up）
目标
在网格中放置灯泡，照亮所有空白方格。灯泡会照亮自身所在方格，以及同一行和同一列的所有方格，直到光线被黑色墙壁挡住为止。灯泡之间不能互相照亮——两个灯泡不能处于没有墙壁阻隔的同一行或同一列。每个带数字的墙壁方格，必须在其上下左右恰好有对应数量的灯泡相邻。
操作方式
- 单击空白方格放置灯泡，再次单击移除灯泡。
- 右键单击空白方格放置圆点标记，表示你认为该位置没有灯泡。再次右键单击移除圆点。
搭桥（Bridges）
目标
通过画水平或垂直的桥梁，将所有岛屿连接成一个互通的网络。每座桥可以是单层或双层。桥梁之间不能交叉。每个岛屿上的数字表示连接到该岛的桥的端点数（双层桥算两根）。允许出现桥构成的环路。
操作方式
- 点击岛屿并拖动到另一个岛屿的方向，即可搭建一座单层桥。再次向相同方向拖动可升级为双层桥。第三次拖动则移除桥梁。
- 单击岛屿（不拖动）可将其标记为已完成，表示该岛的所有桥梁已搭好。
解结（Untangle）
目标
移动各个顶点，使得所有连线彼此不再交叉。游戏开始时线条相互缠绕——你的任务是将它们解开，使其变成平面图布局。
操作方式
- 点击并拖动任意顶点来移动它，与之相连的线条会跟随移动。
滚立方（Cube）
目标
在网格上滚动一个立方体（或其他多面体），收集所有蓝色方格到立方体的各个面上。每次滚动时，立方体离开的网格方格与接触到的立方体面会交换颜色。空白面滚到蓝色方格上会拾起蓝色，但蓝色面滚到空白方格上会把蓝色放回去。请尝试用尽量少的步数，一次性将所有蓝色都收集到立方体的面上。
操作方式
- 方向键——上下左右滚动立方体。
- 点击网格中你希望立方体滚向的位置。
- 类型菜单——可切换其他正多面体（四面体、八面体等），获得更大挑战。
亡灵（Undead）
目标
将网格中所有非镜面的方格填上三种怪物之一：幽灵、吸血鬼或僵尸。网格边缘的数字表示从该位置沿行或列直视网格内部时，可以看到的怪物数量。可见规则如下：
- 僵尸始终可见。
- 幽灵只有在被至少一面镜子反射后才可见。
- 吸血鬼只有在没有经过任何镜子反射时才可见。
操作方式
- 单击方格选中它，然后点击顶部的怪物图标（或按键盘 G 放幽灵、V 放吸血鬼、Z 放僵尸）放置怪物。
- Backspace 键——清除选中方格中的怪物。
- 右键单击方格后输入字母，可添加或移除铅笔标记，表示你认为该位置可能是什么怪物。
- 左键单击线索数字可将其标记为已完成（变灰）。再次单击取消标记。