CONTROLS

Steam Controller

Keyboard

MAIN MENU

ARCADE MODE

Play through 5 stages in this mode. When save data is available, Continue will be available alongside New Game after selecting Arcade Mode.

FREE PLAY

Play any stage completed in Arcade Mode.

OPTIONS

View high scores and change various settings here.

QUIT GAME

Exit the game.

OPTIONS

RECORDS

Check your high scores.

SETTINGS

Change screen and sound settings.

HELP

View help.

ARCADE MODE

Basic rules

The player takes control of a Cannon and uses it to fight off the oncoming Invaders. Once a wave is destroyed, a new wave of invaders will appear. If the Cannon collides with an Invader or one of their shots, or the Invaders reach the bottom of the screen triggering an "Invasion", the player loses one life. Once all a player's lives are gone, it's game over.

PAUSE

Pressing the ESC or backspace key during the game will stop the game and display the pause menu. Pressing either key once more will resume the game.

RESUME GAME

Resume the game.

RESTART

Restart from the beginning of the stage.

*Your score will be reset.
*Pre-restart score will not be registered on leaderboards.

QUIT

Quit and return to the title screen.

SETTINGS

Change screen and sound settings.

CONTROLS

View the keyboard controls.

Screen Layout

① STAGE

The current stage.

② WAVES

The current wave/total number of waves.

③ RATE & RATE GAUGE

The current rate (multiplier) and gauge.

④ CHAIN & CHAIN GAUGE

The current chain number and gauge.

⑤ SHOT LEVEL

The current shot level.

⑥ CANNON STOCK

Number of remaining cannons (lives).

⑦ SCORE

The current score.

⑧ FEATURE PANEL

The current status of the features.

⑨ POWER GAUGE

The remaining time for any power-ups collected or rewarded from fever.

⑩ LAMP

Any bonuses completed will be lit.

⑪ CANNON

The player's craft.

RESULT

Upon completing a stage, the result screen will be displayed, and various bonuses will be rewarded dependent on performance. Achieving A or S ranks gives access to more stages to select from.

① UFOS

Number of UFOs shot down.

② FEATURES

Number of completed features.

③ MAX CHAINS

Maximum number of chains.

④ CANNONS

Number of lives remaining.

⑤ BREAKS

Number of breaks achieved.

⑥ FEVER

Number of times fever achieved.

⑦ ROUTE BONUS

A bonus rewarded for the final stage.

MID-POINT SAVE

Arcade Mode automatically saves player progress just after the result screen. However, there is only one save slot, so choosing Continue from Arcade Mode will restart the game from the where the last play session ended.

CONTINUE

Allows the game to be continued after all cannons have been lost. However, the score will be reset and will not be registered on the leaderboards.

RESTART

Restart from the beginning of the stage.
NB: Your score will be reset.
*Pre-restart score will not be registered on leaderboards.

WORLD RANKING

Once the game has been completed or upon game over, the total score is ranked and recorded on the leaderboards.

FREE PLAY

BASIC RULES

Play stages individually with the same basic rules as Arcade Mode. Any stage finished in Arcade Mode can be selected.

WORLD RANKING

Once the stage has been completed or upon game over, the total score is ranked and recorded on the leaderboards.

GAME MECHANICS

SHOT LEVEL

The cannon levels up as the score increases, powering up the shot at the same time. However, a level is lost each time the cannon is destroyed.

CHAIN

Destroying invaders and UFOs in succession is called a chain. The chain increases with every enemy destroyed before the chain gauge runs out.

While chaining, a chain icon will appear beside the cannon.

RATE

Destroying invaders increases the rate gauge and adds 1 to the multiplier when the gauge is full. The gauge gradually decreases the chain is broken. Rate is reset once a stage is finished.

BREAK

Breaks occur every time a chain of 100 is reached and temporarily grant a 16x rate.

FEATURE

Feature refers to a 'hand' which is completed by shooting down invaders in a certain order (same colour, type). The order is displayed on the feature panel. However this is only displayed before a feature is about to be completed and disappears upon failure.

POWER-UP FEATURE

A power-up feature is completed by destroying 4 invaders of the same colour which triggers a power-up item drop.

ROUND FEATURE

Completing 2 power-up features in a row with different colours triggers a round feature, and the appearance of a flashing UFO. Shooting this down will start a bonus round.

CHANGE TO UFO

Destroying 8 octopus in a row completes the change to UFO feature and all invaders on screen are changed to UFOs.

ROULETTE FEATURE

Destroying 4 squids in a row followed by 4 crabs triggers the roulette feature and the appearance of a roulette UFO.

ROUND

Shooting down a flashing UFO stops the game and takes the player to a bonus round. During a round, the player must complete one of several mini games within a set time. Successfully completing a round restarts the game in fever.

FEVER

Successful completion of a round restarts the game in fever. During fever, the cannon is given a powered-up weapon, making destroying waves much easier.
A bonus is added to the score depending on how many invaders are shot down during fever. After a fixed amount of time, fever will end.

JACKPOT

A jackpot bonus is rewarded for shooting down a white/yellow flashing jackpot UFO during fever. A super jackpot bonus is available for shooting down a yellow/purple flashing UFO.

LAMP

The lamps in the background light up upon shooting certain invaders in the correct order.

COLUMN

Destroy a 4 or more invaders in a vertical line.

ROW

Destroy a 6 or more invaders in a horizontal row.

SAME COLOR

Destroy 10 or more invaders in a row of the same color.

SAME SHAPE

Destroy 10 or more invaders in a row of the same shape.

ROULETTE

Shooting down a roulette UFO stops the game and takes the player to an invader roulette. A well-timed shot is needed.

POWER-UPS

Collecting a power-up item grants the cannon a temporary power-up. The amount of time depends on the type of power-up.

LASER	A beam weapon which fires through almost anything, but is unable to damage reflect invaders.
BOMB	Explodes on impact, damaging everything nearby. It lacks rapid fire, but can damage reflect invaders without risk.
BROAD SHOT	Fires 5 shots at a time. Lacks rapid fire, but can take out enemies and their shots at the same time.
SHIELD	Protects the cannon from enemy attacks. It stands out amongst the power-ups with a comparatively long usage time.
POWER HOLD	During power-up, holding down shift key enables the player to retain the power-up. During this time, the power-up gauge will not deplete and the cannon will fire normal shots.

INVADERS & UFOS

INVADER TYPES

There are numerous types of invaders whose abilities cover a whole range of characteristics.

NORMAL	The most standard invader.
BOMB	When shot, it explodes taking nearby invaders and the cannon with it. Some varieties home in on the cannon.
ARMOR	This invader is equipped with armour and requires several shots to destroy. The armour's durability depends on its size.
ROLL	An extremely thin alien which turns on its side, making it extremely difficult to hit.
BURST	Fires in 3 directions when destroyed.
REFLECT	Reflects shots from the cannon. Two types exist: one with a single use reflector and a second with a reflector which opens and closes.
COLOR CHANGE	Changes colour once every several seconds.
SPLIT	Divides itself into multiple invaders when damaged. Two types exists: one splits in two, the other into three.
ASSAULT	Once damaged, it immediately attempts an "Invasion". One type will charge straight forward, another moves forward and sideways in short bursts.
MIDDLE-SIZE	A mid-size invader. Some types move in formation, others stay still and fire lasers.

INVADER COLORS

The colour of the invaders has a very strong relationship to the bonus features.

BLUE	Completing a power-up feature with this invader grants a laser item.
RED	Completing a power-up feature with this invader grants a bomb item.
GREEN	Completing a power-up feature with this invader grants a broad shot item.
BLACK	Completing a power-up feature with this invader grants a shield item. This colour will not contribute to a round feature.
WHITE	A special type of invader which will not affect features if shot down.

UFO TYPES

There are also numerous types of UFO. They are worth a lot of points, so should not be missed.

NORMAL	The basic UFO. Some types will attack.
LASER	Stops suddenly during movement and fires a laser.
SUPPORTER	Adds additional invaders to a wave while moving.
ROULETTE	Starts a roulette.
FLASHING	Appears when a round feature has been completed and starts the round if shot down.
ROUND	Starts a bonus round. The round will be selected at random.