X/Enemies

Light tanks
These enemies fire slow-moving bullets and drop fuel when destroyed.

Small tanks
These enemies also fire slow-moving bullets, but drop a shield mushroom when destroyed.

Skimmers
These triangular objects hover gently in the air, and will attempt to ram into the VIXIV whenever it approaches. They will also attack while the VIXIV is in the air. Skimmers are the weakest enemies at the beginning of the game, but begin to fire fast-moving bullets starting from Mission 4. They drop a missile when destroyed.

Power tanks
These enemies are extremely resilient. They hardly ever attack in the early missions, but starting from Mission 3, they slowly approach the VIXIV and fire slow-moving bullets. A skimmer emerges from inside when the tank is destroyed.

Spiders
These are fast tanks that look like spiders. They do not attack at all, and will quickly run off when attacked by the player. However, they will drop a bomb when destroyed, which can cause a considerable amount of damage to shield health. Though easily dispatched with missiles, they are extremely difficult to kill using lazers.

Bombs
These are identical to the BOMB weapon used by the VIXIV. Some enemies will drop these instead of an item when destroyed. Bombs are detected as enemies by the VIXIV's radars, and will count towards the player's kill count when they detonate.

Fighter planes
These behave exactly the same as the Skimmers at the beginning of the game. Starting from Mission 7, they will fly around high up in the sky, and attempt to ram the VIXIV while shooting fast-moving bullets. Though extremely fast in the later missions, they will never attack as long as the VIXIV is on the ground. They drop a missile item when destroyed.

Heavy tanks
These bi-pedal tanks are the targets for Mission 3. They walk very quickly, and will ram into anything standing in their path, including other enemies. They cannot be killed with lazers, and take 4 missile shots to destroy. Though they all follow a pre-set route, they ignore areas where the radar base has already been destroyed, so it becomes difficult to pursue them later on in the mission. Their walking speed is doubled in Mission 10, and they will attack any bases that the player tries to enter. Players must use the LOCK ON weapon efficiently to encircle and destroy these tanks.

Mines
These explosives float in midair, and will explode when the VIXIV approaches. A skimmer emerges from inside if the mine is destroyed with lazers. A warning is displayed on screen if the VIXIV's radar detects a mine.

Missile launchers
These are fixed artillery units that are highly resilient to attacks. They randomly drop a missile, fuel, or shield item when destroyed. A warning is issued whenever a missile launcher is detected by the radar. However, these warnings are issued only when a missile is actually launched at the VIXIV.

Missiles
These are launched by the missile launchers, and differ from the missiles launched by the VIXIV using the LOCK ON weapon. They are shown as a "*" shape on screen, and will chase the VIXIV for a long distance and cause large damage when they explode. They can be destroyed with laser shots, and are detected as enemies by the radar. Missiles destroyed by laser shots will count towards the player's kill count.

Alien bases
These were constructed to conceal the location of Doctor Yamano in Mission 4. They appear frequently around the map, and some may house items or enemies. 11 laser shots are needed to destroy these bases.

Metal creatures
These spider-like tanks are hidden within some of the alien bases. They move very quickly, and fire medium-speed bullets. They cannot be harmed by lazers, and drop a missile when destroyed.

Decoy scientists
These are impostors of Doctor Yamano pretending to await rescue inside the alien bases. They are easy to distinguish from the real doctor because they are wearing square-shaped glasses (the real doctor wears round ones) and have noticeably different facial features. Rescuing one of these impostors and facing them for a while will change the background music to a song also used in Mario Paint. They will transform into spiders and attack the player if the real Doctor Yamano has already been rescued.

Alien tunnels
These tunnels were constructed in Mission 5 to allow the aliens to attack from underneath the ground. Though they can be entered the same way as radar bases, the entrance opens and closes at certain intervals, and the VIXIV will receive damage if it attempts to enter while the entrance is closed. Destroying these tunnels requires the player to enter within, use the BOMB weapon in the vicinity indicated by the arrow, and escape from the tunnel within the set time limit.

Teleporter tanks
These tanks emerge from alien tunnels, and rapid-fire bullets while moving around very quickly. They teleport when targeted by the laser, and will re-appear to attack the VIXIV from another direction. They appear on the map regardless of alien tunnels in Mission 10. They look completely different in Missions 6 and 8, and also have very high resistance to attacks. They do not attack in Mission 6, but will fire high-speed bullets in Mission 8. They drop a shield mushroom when destroyed in any of the missions.

Giant larvae
These larvae mutated into gigantic creatures due to radiation from the Nuclear Silo. Their only attack is to ram the VIXIV, and they will drop a missile item when destroyed. They are abundant when they first appear in Mission 6, and destroying them to collect additional missiles is the key to completing that mission. In Mission 8, they have matured to become much faster and much more resilient to attacks. The larvae in Mission 8 drop a fuel item when destroyed.

Insects
These aggressive creatures attack the trucks carrying the reactor rods in Mission 6. They hop around while moving, so the player must stun them with the laser, and quickly kill them off with a missile shot.

Fighter bases
These bases spew out mass-produced fighters, and cannot be harmed with the laser. They drop a shield when destroyed.

Mass-produced fighters
These begin to appear in the later missions along with the fighter planes. They emerge from fighter bases in large groups, and will attempt to ram the VIXIV in pairs. Unlike fighter planes, they do not shoot bullets, and their resistance is the weakest of any of the enemies since they can be killed off with a single laser shot. They drop fuel when destroyed.

Gliders
These enemies randomly fly around a set area of the sky. They do not attack with bullets, and are harmless unless they happen to collide with the VIXIV, but cannot be harmed by lazers and require 2 missile shots to be destroyed. Targeting them with anything other than the HIGH-EX is very difficult, but they drop a coin item when destroyed.

Super gliders
These appear in Mission 7 to carry off the stolen reactor rods. They have a bird-like shape, and will fly high up in the air. They do not attack, and are easy to kill off in the air using lazers, or from the ground using the BOMB weapon.

Cocoons
These are mutant larvae preparing to metamorphose into butterflies, and must be destroyed in Mission 8. They do not attack or move until the time limit has passed, but attacking them with the laser will cause them to become butterflies even before the time limit. They must be destroyed with missiles.

Butterflies
These gigantic butterflies will appear in Mission 8 if the player is unable to destroy all of the cocoons within the time limit, or from the very beginning of Mission 10. They fly around slowly, and will circle around radar bases and attack them using lazers. Their irregular movements make them difficult to hit, though having the JETPAC makes it much easier to hit them with lazers. They can also be destroyed from the ground using the BOMB weapon.

Cruise missiles
These missiles were launched to destroy the Nuclear Silo in Mission 9, and must be destroyed before they reach their target. They fly around slowly in the air, and cannot be destroyed with lazers. They are difficult to hit with the LOCK ON weapon, and require two shots to destroy from the ground with the BOMB weapon. They drop a coin when destroyed.

Mothership
The mothership of the alien army is the final boss of the game, and is the main target in Mission 10. The ship cannot be approached because it is surrounded by some sort of invisible barrier. The only way to destroy it is to hit it repeatedly with the HIGH-EX missile.

Mission commanders
These allied characters will contact the player each level with the mission objectives, but will appear on the game field as enemies if the player purposely attacks a friendly base or facility. Mission commanders will float around the VIXIV, attacking by ramming or firing fast-speed bullets. Lazers cause no effect on these enemies, and they cannot be locked onto as a target. They also drop bombs at the VIXIV when destroyed.