Upon startup Bolo requests a level number (1–9) and density (1–5); the game then generates a random rectangular maze containing six enemy bases. The higher the density specified, the more walls appear in the maze. The player controls a tank, and must destroy the six enemy bases to advance to the next level. The player can view 1/132 of the maze at one time; indicators on the right side of the screen show the player's position within the maze, the direction of the enemy bases and the fuel remaining.
Enemy tanks constantly emerge from each of the six enemy bases. Different levels feature different types of enemy tanks; some move randomly while others pursue the player. All enemy tanks fire deadly shells. If the player collides with a bullet, an enemy base or tank, or a wall, a turn is lost. A turn is also lost if the player runs out of fuel; destroying an enemy base will replenish the player's fuel supply. The player is provided with four tanks per game, and no opportunity is provided to earn more.
Heavily inspired by the sci-fi movie "Alien", you task is the capture or the killing of the alien on board your ship or the activation of the self-destruct sequence. In order to accomplish that you have to assign your crew memeber different tasks like accessing to the computer system, build weapons etc.
Alien Addition is an educational game that mixes maths problems with the gameplay of a shoot 'em up. The player controls a cannon left and right along the bottom of the screen and has to shoot down the aliens space ships that appear above him. There are five ships in a row and they slowly begin descending down the screen. Each ship has a maths problem written on it and to shoot it down the player has to enter the correct answer for the ship above him. The player is destroyed if any ship reaches the bottom. The game otherwise runs for a fixed time which can be customized by the player. Other customization options include skill level (1 to 9) and problem range (3, 6 or 9).
With the beginning of a new game, a map screen is shown with the player's position, as they control a ship set in a series of interconnected caverns. They must first plan out the best route in order to get to the central area in each Mission.
After several seconds, the map screen changes to a cavern that the player is currently in, which each cavern has a core in the center that is constantly growing, as well as having several Planet Protector enemies. It is usually in the player's best interest to clear out each area of Planet Protectors by shooting them, then carefully inching their way to the protective barrier by an exit in order to drill through it. Once the barrier has been disabled by the drill, the player can then fly into the next cavern and thereby gets a step closer to the central area.
The view changes from a cavern to the map screen with each cavern that they pass, showing the player's(') progress. Once the central central area is reached, the player(s) must drop a bomb at the center core, which they
Satan's Hollow is a shoot 'em up arcade game released by Bally Midway in 1982, subsequently converted to the Atari 8-bit family, and in 1984 to Commodore 64.
Piloting a pie-shaped spacecraft, you must move from sector to sector collecting treasure while avoiding enemies and corner-mounted lasers. The more treasure you have with you the higher your bonus when you reach the goal. A "thief" roams the sectors collecting treasure at the same time, but shooting the thief causes him to drop all his treasure.