Pengo (ペンゴ) is an arcade game developed by Coreland and published by Sega in 1982. The player controls Pengo, a red penguin that resides in the Antarctic. The game takes place in an overhead maze made of ice blocks, where Pengo fights the patrolling, blob-like Sno-Bees. The objective of the game is for Pengo to survive a series of rounds by eliminating all Sno-Bees, while amassing bonuses by bringing together the three diamonds dispersed in the maze. The player uses a joystick and a single button as controls. Pressing the button while pushing the joystick will cause Pengo to push forward the ice block he is facing, which will slide until it hits a wall or another ice block, crushing any intervening Sno-Bees. Crushing more than one Sno-Bee at once will increase the number of points awarded. There are a total of sixteen levels, which repeat in order starting on the seventeenth round. As the player crushes those on patrol, new Sno-Bees hatch from eggs located within ice blocks. At the start of each level, blocks that contain these eggs are briefly identified by flashing the color of that level's Sno-Bees. Eggs can be eliminated by crushing the ice blocks that contain them. If Pengo pushes a side wall the water "vibrates", any adjacent Sno-Bees will be briefly stunned, and are eliminated (for 100 points) if Pengo walks over them in this state. Eliminating all Sno-Bees in a round will progress the player to the next. Diamond blocks are unbreakable; when connected in a horizontal or vertical line the player earns bonus points: 10,000 points if aligned without being against a wall or if only one diamond block is touching a wall, 5,000 points if all three are against the wall. Alignment will also temporarily stun all Sno-Bees. After 60 seconds elapse in a round without a death, the game enters into sudden death mode; the music tempo and movement of the Sno-Bees accelerates. If a single Sno-Bee remains in the round, a jingle plays and the Sno-Bee accelerates in an attempt...