You pilot an arrowhead-shaped vessel at the bottom of the screen, facing off against four different types of enemies. Certain enemies drop 'space soldiers' when shot, if these make it to the bottom of the screen, they will try to 'spear' your ship from behind.
There are two ways to lose. The primary and most familiar is to exhaust ships, but the player guards ranks of blocks which are stolen and placed to spell the words "The End". The game is over when this happens.
"The game consists of four different encounters in space, in which the player has to fight battles.
Upon the successful completion of each series of encounters without losing all his ship, the game recommences, and the player is faced each time with greater difficulties. The skill of the player will enable him to play the game until such time as he enters into battle and all his ships are destroyed."
A "Galaxian" type game. Shoot the flashing car (alien) on the screen the clear the level.
HWY (pronounced Highway) Chase was released in December 1980 in the Japanese arcades. It was the very first video game made for this system (Cassette No. 01) along with Sengoku Ninja-tai (known as Ninja out of Japan) and Manhattan.
It is said the title HWY Chase (HWY instead of Highway) was selected to easily recycle source code and materials made for 'Mad Rider', released earlier as a PCB, and known as 'Mad Alien' out of Japan.
Dorachan is an arcade game featuring the likeness of the robotic cat Doreamon, who is better known from manga and anime. The game involves avoiding enemies and collecting dots before a timer runs out, and consists of two screens of play.
Digger is a retooled version of the Japanese computer/arcade game Heiankyo Alien. It features graphical enhancements and and an enemy that gives bonus points when defeated.