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Alien Arena (Stargate upgrade)

  1. Game infos
  2. Parent and Clones
  3. Sound
  4. Driver
  5. Inputs
  6. Controls
  7. Display
  8. Roms list
  9. Chips list
  10. Categories
  11. History
Download alienaru.zip (0 B)
Snapshot

Game infos

Description Alien Arena (Stargate upgrade)
Name alienaru
Manufacturer Duncan Brown
Year 1985
Runnable yes
System arcade /
Number of players 2P sim
Added to MAME .103u4
Romset size 0 B
Romset file files
Romset zip 0 B
Language English
Genre Maze

Parent and clones

Parent alienar : Alien Arena (1985)

Sound infos

Sound_channels 1

Driver infos

Driver status good
Driver emulation good
Driver color good
Driver sound good
Driver graphic good
Driver cocktail
Driver protection
Driver savestate yes

Inputs infos

Input service no
Input tilt yes
Input players 2
Input buttons
Input coins 3

Controls infos

type ways minimum maximum sensitivity keydelta reverse
joy 8 no

Display infos

type rotate flipx width height refresh pixclock htotal hbend hbstart vtotal vbend vbstart
raster 0 no 292 240 60.096154 8000000 512 6 298 260 7 247

Roms list

console name bios size crc md5 merge sha1 region offset status optional
arcade aarom01 4096 bb0c21be aarom01 dbf122870adaa49cd99e2c1e9fa4b78fb74ef2c1 maincpu 10000 good no
arcade aarom02 4096 165acd37 aarom02 12466c94bcf5a98f154a639ecc2e95d5193cbab2 maincpu 11000 good no
arcade aarom03 4096 e5d51d92 aarom03 598c928499e977a30906319c97ffa1ef2b9395d1 maincpu 12000 good no
arcade aarom04 4096 24f6feb8 aarom04 c1b7d764785b4edfe80a90ffdc52a67c8dbbfea5 maincpu 13000 good no
arcade aarom05 4096 5b1ac59b aarom05 9b312eb419e994a006fda2ae61c58c31f048bace maincpu 14000 good no
arcade aarom06 4096 da7195a2 aarom06 ef2c2750c504176fd6a11e8463278d97cac9a5c5 maincpu 15000 good no
arcade aarom07 4096 f9812be4 aarom07 5f116345f09cd79790612672aa48ede63fc91f56 maincpu 16000 good no
arcade aarom08 4096 cd7f3a87 aarom08 59577059308931139ecc036d06953660a148d91c maincpu 17000 good no
arcade aarom09 4096 e6ce77b4 aarom09 bd4354100067654d0ad2e590591582dbdfb845b6 maincpu 18000 good no
arcade aarom10 4096 6feb0314 aarom10 5cf30f097bc695cbd388cb408e78394926362a7b maincpu d000 good no
arcade aarom11 4096 ae3a270e aarom11 867fff32062bc876390e8ca6bd7cedae47cd92c9 maincpu e000 good no
arcade aarom12 4096 6be9f09e aarom12 98821c9b94301c5fd6e7f5d9e4bc9c1bdbab53ec maincpu f000 good no
arcade decoder.4 512 e6631c23 9988723269367fb44ef83f627186a1c88cf7877e proms 0 good no
arcade decoder.6 512 83faf25e 30002643d08ed983a6701a7c4b5ee74a2f4a1adb proms 200 good no
arcade sg.snd 2048 2fcf6c4d 9c4334ac3ff15d94001b22fc367af40f9deb7d57 soundcpu f800 good no

Chips list

name tag type clock
M6808 soundcpu cpu 3579545
M6809 maincpu cpu 1000000
MC1408 dac audio
Speaker speaker audio

Categories

History


Arcade Video game published 34 years ago:

Alien Arena (c) 1985 Duncan Brown.

Player 1 (Thor) and Player 2 (Zespar) are battling it out in the Alien Arena. The game is timed, with 2 minutes for every 25 cents inserted, regardless of your choice of 1-player or 2-player. More time can be purchased at any time before the timer reads ':00'.

In a 1-player game you are Thor, with controls on the right, and the computer plays Zespar, on the left. In a 2-player game each of you chooses a set of controls. When time runs out in either game, it reverts to a "play as long as you can keep alive and possibly winning extra lives" 1-player game. If it started as a 2-player game, whoever is winning when time runs out is the one who gets to battle the computer.

The basic theme of the game is "capture the flag (while protecting your own)". You can assemble offensive and defensive aids by picking up 'pieces' strewn about your half of the playfield. The pieces are color-coded, randomly created and distributed, and different objects require different numbers of pieces to assemble. Once you start assembling an object, you must finish assembling it (pick up enough pieces for it) and place it... or 'flush' the pieces you've picked up so far. Flush is mostly used for when you accidentally picked up the wrong color piece... or when you don't have the required pieces to assemble the rest of the object. A status bar shows what object is under construction, and how many more pieces are needed. Only one object can be assembled at a time. Once it is assembled, you must carry it to where you want to place or launch it and press the 'place' button.

There is a delay at the beginning of each round before the flags appear, and then a further delay before the midfield barrier comes down. Use this time to start assembling an offense or defense or both (this keeps the opponent from just starting each round by making a suicide dash for your flag). When the flags do appear, their placement is random, but within a small distance from the back wall of your half of the arena.

A round ends when an opposing flag is captured by a player, or when a player is destroyed by one of his opponent's offensive or defensive objects. There are all sorts of nuances to how the objects behave, how they score, etc.

- TECHNICAL -

Main CPU : Motorola M6809 (@ 1 Mhz), OKI M6808 (@ 894.75 Khz)
Sound Chips : DAC

Screen orientation : Horizontal
Video resolution : 292 x 240 pixels
Screen refresh : 60.00 Hz
Palette colors : 16

Players : 2
Control : 8-way Joystick
Buttons : 2

- TRIVIA -

Short history by Duncan Brown:
"By 1984, I had reverse-engineered the hardware used in Williams' games to the point where I had essentially created a 'programmer's guide' for it. Destiny called, I had to write a new game from scratch for this great hardware! My original intent was to end up with a conversion kit that was more user-friendly than most (remember this was back when conversions were just starting to come into existence, long before JAMMA, and most of them were a complete mess to install). A new marquee, new side stickers, new control panel, and 12 EPROMs, and away you go! No messy wiring, board modifications, etc. My production costs would be low, my sale price could be high."

"Well, that was the plan anyway... Over the course of a year, I wrote Alien Arena. It was written in 6809 assembly language using a cross-compiler on an Apple II+. Using custom-designed and handbuilt emulator hardware ('24' 2Kx8 static RAMs on a board connected to the Apple with a custom bus interface!) I could test out my code without the slowdown of programming and erasing a bunch of EPROMs all the time."

"When I was done, I assembled it into an ex-Stargate cabinet, and put it out in the arcade I owned at the time. I made a few modifications (mostly to the computer-player AI) based on feedback from customers. I cannot say it was an immense hit. Most people thought it sucked, frankly. You decide for yourself. I know my wife and I had a blast playing it while I was designing it (probably added 6 months to the time to finish it, heh heh heh...)."

This is quite literally the rarest game ever produced for the Williams hardware (production run of one!), and it has been out of circulation for 10 years.

Two blocks of copyright text are in the game. Unlike the rest of the text in the game, these messages are in ASCII format.
First message at 0x105E3:
ALIEN ARENA IS (C) COPYRIGHT 1985
DUNCAN BROWN. ALL RIGHTS RESERVED
***DON'T INFRINGE ON ME***

Second message starts at 0x12596:
ALIEN ARENA IS (C) COPYRIGHT 1985
DUNCAN BROWN. ALL RIGHTS RESERVED
SO THERE.

- STAFF -

Designed by: Duncan Brown
From an idea by: Stowe Keller

- CONTRIBUTE -

Edit this entry: https://www.arcade-history.com/?&page=detail&id=4945&o=2