The Earth's fate was nearly sealed when a race of cybernetic organisms first appeared from the sky in the year 2067. It was soon obvious that they came only for conquest. After nuking most of the planet's major metropolitan cities, the human race was rounded up into squalid settlements so that they could be contained and studied. Completely subjugated, there is no chance for rebellion, only revenge. Shoot your way through the endless hordes of Earth's cybernetic occupiers. Re-arm between each wave at the base where you can buy up to 21 different weapons and 12 different powerups!

Move your character around the battlefield to engage and overwhelm the enemy.

Each battlefield has a supply base which must be protected at all costs. Enemies will arrive in waves, and it is your job to fend them off. After each wave, there is a short rest period where you can resupply your character at the bases' shop. Here you can find all various items such as weapons, medicine, body armor and construction material.

Scattered along the way are the walls of long since vaporized cities. Use these ruins to your advantage to gain time while employing hit and run techniques to baffle the enemy. Blasting away at a wall can remove an unwanted obstacle, but it will require some serious firepower. When you are standing against a wall, it is possible to point your gun over the top to fire at enemies behind.

If you survive to turn back the horde in one location, you will be relocated to another location with your health replenished so that the human race's final stand can last another day.

During the game, important information for your success is displayed on the screen...

Weapon Information - At the top-left of the screen you will see the name of the selected weapon and an image of that weapon. To the right of the image shows the amount of ammunition remaining in the clip and the current firing mode. Below the weapon image is a bar which has two states:

1) When you have ammunition this will show the time until you are able to fire the weapon again.
2) When you don't have ammunition this will show the time until reloading is complete.

Player/Base Information - Below the weapon HUD is a red cross icon, underneath there are two bars which show your current health (left) and body armor status (right). The body armor bar is split into two sections, one for the helmet (top) and for the vest (bottom). To the right of the health icon is the base icon, below which is a bar showing damage done to your base. Below these bars you can find the total number of kills thus far, how much money you have for purchasing supplies, the current location and wave.

Enemy HUD - Below the player/base infomation you will find a HUD showing the locations of the enemies. Each enemy has a unique color based on its type so that you can assess threats more effectively. The base is represented by a gray circle. If either you or your base takes damage, a red halo will appear around that location.

- Moves the player

Roll - Changes weapon

  or Press - Reloads weapon

j key - Switches the mode of your weapon (when applicable)

Shooting - Use the following letter keys to shoot:

y key - North-West
u key - North
i key - North-East
h key - West
k key - East
n key - South-West
m key - South
, key - South-East

Note: When using burst and automatic weapons, you can hold down two adjacent shooting keys to fire at intermediate angles. For example, holding the u and i keys would fire North-North-East. 

At the supply shop you can find a wide collection of weapons broken down into the following categories:

Pistols - Standard sidearm, effective against lesser threats.
 

Magnums - More powerful than the common pistol, these weapons fire larger slugs capable of stopping enemies in their tracks, if not taking them down altogether.

Sub-Machine Guns - Lightweight automatic weapons that can bring more firepower to bear when in the midst of a cyborg swarm, but weak in long distance attacks.

Shotguns - Very powerful at close range, effective at keeping the enemy at a distance with a single blast.

Assault Rifles - Heavier automatic weapons which fire larger slugs at a faster rate.

Sniper Rifles  - Highly accurate and capable of devastating damage. These weapons are loaded with munitions capable of passing through enemies, damaging multiple targets along their path.

Chain Guns - An extremely fast firing rate unleashes a rain of hot metal sufficient to annihilate any foe.

Weapon Modes - Some weapons have the ability to use different firing modes...

Semi-Automatic - Will fire as often as the firing key can be pressed.

Burst - Will fire a group of 3 shots per press of the fire key.

Automatic - Will fire as long as a firing key is held (provided there is ammunition).

Med-Kits - There are three levels of medical kits for patching up even the most severe wounds.

Kevlar Vest/Helmet - Protective wear for your vital organs.

Stim Pack - A shot of adreneline which provides a speed boost for the next wave.

Repair Kits - Good for patching up holes in the base against the continuing onslaught.

Reinforcement Kits - Fortifies the base so it can take more damage.
 

C-232 "Spike" - Not-so-lovingly nicknamed "Spike" amongst the human survivors, the C-232 is the smallest of the enemy race and uses a simplistic ramming attack.
 

MEP-4F Blast Drone - A flying droid capable of maneuvering above obstacles. Set to explode on contact with human flesh, but has also been seen to go after supply bases.
 

N-4DN Buzzborg - This midrange enemy employs a high-speed circular saw used to slash its way to carnage.
 

A-4 Arachnid - Poised atop 4 spider-like legs, the Arachnid carries two missile tubes to battle. It is highly advised to keep your distance since they are only capable of targeting at close range.
 

R-1000 "Laserbreath" - Don't get caught looking at your reflection when this polished metal behemoth comes on the scene. When targets are in range it fires a powerful laser from its optical visor.
 

DOA-570 Super Droid - The peak of the enemies technology, the DOA-570 has super-strong armor and two pulse cannons at the end of each arm. Defeating these foes will require only the fiercest of firepower.