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Spira-Defence

A tower defence game with a twist. You must defend your base from enemy attack by building/upgrading defence towers. Money is awarded for kills to spend on upgrades. Interest is earned on the money not spent.

screen screen screen

News

Please see the blog for news and changelogs.

A FAQ is available at the bottom of this page here.

Pro Version

A paid for 'Pro' version is available. The differences between Pro and standard are:

- Ad Free

- Unlimited levels (standard is caped at 72)

Instructions

Money (bounty) is awarded for kills and interest is earned on the money left in the bank at the end of a level. Money can be used to upgrade the towers in various ways. To sell a selected tower, click the sell button, then confirm.

Current interest rate and bank balance are shown under the score in the top left of the screen. Current level and lives left are shown in the top right.

Towers

Select one of the initially empty 5 positions on your base in order to build a tower. The basic towers are as follows:

Rapid - Cheapest and inflict the least damage, but fast with a range advantage. Their rate of fire can be improved.

Chain - Average cost and range, but with high damage per hit. The damage continues to nearby enemies. The number of enemies affected can be improved.

Slower - Expensive and slow, but have the property of slowing 3 enemies to make them easier targets for other towers. Their slowing effect can be improved.

Pusher - Expensive, slow, with moderate damage. When an enemy is hit it is pushed a set distance out of its spiral formation. This distance can be improved.

Reaper - Expensive, very slow, but inflicts the most damage in a single hit. If this tower is the cause of an enemy's death, there is a chance that its life may be claimed and added to your own. This chance can be improved.

Gold - When this tower hits an enemy, the enemy becomes marked. If the enemy is killed whilst marked the bounty paid for the enemy is raised.

Each tower can have a separate strategy for which enemy to target. These are available at the bottom of the screen when a tower is selected:

Close - Target the enemy closest to the tower

Hard - Target the enemy with the most life

Weak - Target the enemy with the least life

Fast - Target the fastest enemies

Towers can be sold, but beware - you wont get as much for them as you invested in them!

Powers

A special enemy that releases a power is available every 2nd level (except where bonuses are available - see Bonuses). To use a collected power, select the corresponding power buton along the bottom of the play screen. Only one power may be active and will only last the duration of the current level.

SCR (Score) - The score from enemies is increased.

RNG (Range) - Tower range is increased.

MNY (Money) - The bounty from enemies is increased.

DAM (Damage) - Tower damage is increased.

FRZ (Freeze) - All enemies are frozen and move slowly.

BOM (Bomb) - All enemies explode!

Bonuses

A special enemy that releases a bonus is available every 8th level. The bonus is awarded automatically.

Reward - Receive a score and money bonus.

Interest - Interest rate is increased.

Lives - Gain extra lives.

Additionally, extra lives are awarded at 50,000 points, 100,000 points and every addition 100,000 points scored.

Tips

Spend the least ammout possible each level to increase interest earned.

FAQ

The game is not saving my game / hi scores / options? It used to, so whats wrong?

I recently removed Google copy protection from the game. This was to allow people with dev phones access and it reduces the memory foot print for everyone. Users with previously installed versions with copy protection who then overwrite it with the new unprotected version could see this problem. If you do please uninstall, reset and reinstall.

How do I uninstall the game?

I believe there is an option to uninstall in Settings > Applications > Manage Applications > Spira Defence. If that doesn't work, try restarting the phone and trying again.

I can't install the latest version (the update is not signed correctly)

If upgrading from a version prior to 0.9.3 you will need to uninstall the old version first. You wont need to uninstall for future updates.

The game wont download (pro)

Almost all queries I get from people who say the Pro version wont download involve a disputed payment in Google Checkout. Please check for emails from them, or log on to your Checkout account to investigate.

Why does the game require internet access?

In order to support the uploading of hi score data to this web site.

How many levels does the game have (Pro)?

Unlimited. It's not a game you 'complete' just compete for high score / high level. I would consider level 64 to be an achievement.