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Space Attack / Head On

| 1979

Release type:
Units produced: Sega
Controls/Input Device: Control(joy4way), Buttons(2)
Number of Players: 2
More Creator:
More Coder/Software:
License from/Copyright:
SoundMix: none
More Graphics/Artwork:
More Music/Sound:
Acting Talent involved:
More Machine Details:
More System Details:
Game Awards Nominations:
Game Awards Won:
Title a.k.a.:
Avg. Playtime:
Similar Games:
MAME folder name: sspacaho

Display: raster 256x224 @ 60.00Hz (60.00 pixclock)
Sound: 1 channels

Emulated in MAME via driver vicdual.c:
Status: preliminary; Emulation: good
Graphic: good; Sound: preliminary; Color: good
Palette size: 0; Savestate: unsupported

316-0138.u44 with 32kb
sha1:26b6bd2a1973b83bb9af4e3385d8cb14cb3f62f2 crc:67104ea9
316-0206.u14 with 32kb
sha1:7cff2741866095ff42eadd8022bea349ec8d2f39 crc:9617d796
epr00001.bin with 2048kb
sha1:7cfc079c6afe317b6c389c06802fdf1f83858510 crc:ba62f57a
epr00002.bin with 2048kb
sha1:e6ee1c25fb45d03d514421c231d794f9da05f47f crc:94b3c59c
epr00003.bin with 2048kb
sha1:61d210eeb59fe132e14fdd7eb6a39ebc55168097 crc:df13aef2
epr00004.bin with 2048kb
sha1:b028e718ee90f37c848e5f83494be61cb90338e2 crc:8431e15e
epr00005.bin with 2048kb
sha1:4ed830755b4d1da6111afc6c16c7c633521ccb9c crc:eec2b6e7
epr00006.bin with 2048kb
sha1:533879b8abf0e69644fd8b784dbe9bf10cde6d9f crc:780e47ed
epr00007.bin with 2048kb
sha1:3c13a394f48adb8f7c6b8203bd0749921461ea06 crc:8189a2fa
epr00008.bin with 2048kb
sha1:a588fae0ecaa80677887d8c95ef8896a4bdd77ee crc:34a64a80
Mameinfo.dat entry:
0.37b10 [Yochizo]


- 0.147u2: hap fixed clone Omega Fighter Special. The game fails to boot or finish post. After showing bad rom errors, the game resets.

- 0.147u1: Fixed maincpu rom loading.

- 0.122u7: Fixed gfx1/2/3/4/5 rom loading.

- 0.89u3: Changed Z80 CPU2 clock speed to 5MHz.

- 0.37b10: Yochizo added 'Omega Fighter' (UPL 1989) and clone Omega Fighter Special.

- 21st November 2000: Yochizo fixed some graphics bugs in the Omega Fighter / Atomic Robo-kid driver.

- 8th November 2000: Yochizo sent in a driver for Omega Fighter and Atomic Robo-kid.

- 25th April 1999: Dumped Omega Fighter Special.

LEVELS: 8 (restarts once)

Other Emulators:

* FB Alpha


* Raine

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Lethal Thunder


Strike Gunner S.T.G


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Viper Phase 1

Fever SOS

Mars Matrix: Hyper Solid Shooting

Romset: 2016 kb / 8 files / 457.8 zip

Credits Mameinfo and Mametesters Project Robert J. Rabgno et al.
History.dat entry:
Space Attack + Head On (c) 1979 Sega.

Head On is a two-dimensional maze racing game. You control your car through the maze to pick up the dots while at the same time avoiding the car, or cars, that are constantly trying to ram you. Successfully get through one maze and many more await you. This is good practice for freeway driving in the big city.

Space Attack is another game inspired by "Space Invaders". This one is a more straightforward version, although after you finish off a rack a UFO starts working its way down; shoot it and you'll get a bonus (and maybe a free ship).


Main CPU : Zilog Z80 (@ 1.93356 Mhz)

Screen orientation : Vertical
Video resolution : 224 x 256 pixels
Screen refresh : 60.00 Hz
Palette colors : 64

Players : 2
Control : 4-way joystick
Buttons : 2


Space Attack / Head On is worth mentioning due to it having a rom marked as 'EPR-1', the first of Sega's now 20,000+rom naming scheme!.

Head On is reputed to be the first game in which the player must "eat" all of the dots in order to progress to the next level (One year before "Pac-Man", Head On was the first 'eat-the-dots'-style game).


* Scoring for Head On :
Dots : 5 points. There are 140 dots per maze to clear giving you 700 points per maze.

* Scoring for Space Attack :
Bottom aliens : 100 points
Middle aliens : 200 points
Top aliens : 300 points
UFOs : 1,000 - 3,000 points


Tips and tricks for Head On :

* When you start the game, your car will be located in the open space in the middle of the bottom of the screen in lane one. The jam car will be located in the middle left of the screen in lane one. On the higher levels, they will progress through lanes one, two, and/or three. As you progress through the levels, the number or speed of the jam cars increases. Here is the breakdown :
Level 1 : One Slow Jam Car
Level 2 : One Fast Jam Car
Level 3 : Two Slow Jam Cars
Level 4 : Two Fast Jam Cars
Level 5 : Three Slow Jam Cars
Level 6 and beyond : Three Fast Jam Cars

* Always be aware of where the Jam Car(s) is/are located. They can only make one lane change at a time but that lane change may be into your lane.

* The faster you go, the fewer lanes you can cross. At full acceleration, you will only be able to change one lane at a time. In the earlier levels, this will be fine since you will only be dealing with one car. In the multiple Jam Car levels, this can be a very bad thing. Decelerate (take your finger off the accelerate button) to go across multiple lanes.

* The Jam Car(s) always travel in a clockwise motion while you travel in a counterclockwise motion. Remember that so that you don't get confused when there are multiple cars in the maze. Also, the color of the Jam Car is red while yours is white.

* Don't try to get all the dots on one of the lanes. You need to anticipate where your next move is well before you enter the lane change area since you cannot change lanes at any other time. Sometimes, on the earlier levels, it is best to do a staggered type dot pickup where you do lane one, change to lane two, to lane three, lane four, lane five, then back to lane one. If you time it right, the Jam Car or Cars will still be in the maze.

* Don't let the speed of the Jam Car(s) throw you. Just plan to be out of your lane and in the lane change area before them. If both cars enter at the same time, you run a big risk of a collision.

* Since the game isn't timed, take your time planning on how you will take care of the dots. Don't take chances since you will have to restart the level if your car gets destroyed.


Edit this entry: http://www.arcade-history.com/?&page=detail&id=2515&o=2

Licensed from Alexis Bousiges under a CC Attribution 3.0 License
cheat.dat entry:
20800000 19AD 000000C3 FFFFFFFF Bullet Invincibility (Space Attack)
00000000 85D9 00000006 FFFFFFFF Infinite Lives (Space Attack) PL1
00000000 85DB 00000006 FFFFFFFF Infinite Lives (Space Attack) PL2
60000000 0000 00000000 00000000
20800000 323F 00000018 FFFFFFFF Invincibility (Head On)
00000000 85BE 00000005 FFFFFFFF Infinite Lives (Head On) PL1
00000000 85BF 00000005 FFFFFFFF Infinite Lives (Head On) PL2

Credit Pugsy's MAME Cheat file