Shamus (video game)

Shamus is a flip screen shooter with light action-adventure game elements written by Cathryn Mataga (credited as William Mataga) and published by Synapse Software. The original Atari 8-bit family version is 16K in size and was released on disk and tape in 1982. The game was ported to the Apple II, VIC-20, Commodore 64, TRS-80 Color Computer, TI-99/4A, and IBM PC. Several of these were published by Atarisoft. It was later sold on cartridge by Atari Corporation following the launch of the Atari XEGS in 1987. "Funeral March of a Marionette", the theme song from "Alfred Hitchcock Presents", plays on the title screen.
According to Ihor Wolosenko, co-founder of Synapse, "Shamus" made the company famous by giving it a reputation for quality.
It was followed by a sequel, "", with the same characters but different gameplay. In 1999, Mataga released a remake for the Game Boy Color, and later, both "Shamus" and "Shamus: Case II" for iOS.
Gameplay.
Inspired by the arcade game "Berzerk", the objective of the game is to navigate the eponymous robotic detective through a 4-skill level, 128-room maze of electrified walls. The ultimate goal at the end of this journey is "The Shadow's Lair". "Shamus" differs from "Berzerk" in having a persistent world instead of rooms that are randomly generated each time they are entered. There are also items to collect: bottles containing extra lives, mystery question marks, and keys which open exits.
Opposing the player are a number of robotic adversaries, including spiral drones, robo droids and snap jumpers. Shamus is armed with "Ion SHIVs", SHIV being an acronym for Short High Intensity Vaporizer, and is able to hurl up to two at a time at his enemies. Like many other games in this genre, touching an electrified wall results in instantaneous death. Upon the completion of each level, the gameplay speeds up, increasing the chances of running into a wall.
The main gameplay involves clearing the room of all enemies, picking up special items on the way and then leaving through an exit. Upon returning to the room, the enemies are regenerated and returned to their original positions. In exactly the same way as "Berzerk", the player will be attacked if they spend too much time in one room. In this case, the Shadow himself emerges from off-screen and hops directly at Shamus, unhindered by the walls. If shot, the Shadow briefly freezes in place.
The combination of locks and keys requires the player to complete each of its four levels in a particular order. To complete the game in its entirety would take several hours, which combined with the lack of a pause function (except on the IBM version), the necessity of remembering the location of dozens of rooms and keys, and the frenetic gameplay, meant that this was extremely difficult to accomplish.
Each maze layout is named after a famous fictional detective or secret agent.
Ports.
The VIC-20 port is 8K and contains only 32 levels, unlike the 128 in every other version. 
Reception.
"Softline" in 1983 stated that ""Shamus" is the best cross between arcade and adventure games currently on the Atari market ... To know it is to love it, play it constantly, and not get enough of it". That year "Softline"'s readers named the game seventh on the magazine's Top Thirty list of Atari 8-bit programs by popularity, and in 1984 they named "Shamus" in tenth place for 1983. 
"Electronic Fun" gave the Atari version a 3 out of 5 review, calling the graphics "superb" and saying "this doesn't look like it could ever get boring." "ROM Magazine" gave the Atari version a 9.4 out of 10 rating, and "Creative Computing" suggested "Make sure you have no pressing appointments before becoming involved in a round of "Shamus". Once you get going, you won't want to stop for a while." "Ahoy!" wrote in 1984 that "Shamus" for the Commodore 64 "is a thoroughly enjoyable game with all the action and suspense that both novices and sophisticated gamers will demand".
In 1982, "Computer Gaming World" reviewed the Atari original, praising the animation and the "vastly superior graphics" over "Berzerk", but complaining of the inability to pause the action and of a bug in the speed control. "Shamus" was considered "the most addictive" of the four games reviewed.
Matthew J. Costello reviewed "Shamus" in "Space Gamer" No. 68. Costello commented that ""Shamus" is not easy, but the folks at Synapse are giving Atari owners their money's worth."