Shield Defense is a game played like breakout, this time there's no ball. You need to bounce the bullets back to the enemy tanks. Don't get hit and enjoy and original game with many upgrades.

Upgrades:

Repair Base - Repairs 25 points of structural damage.
Repair Kit - Click the icon or press 'R' during a level to repair 25 HP of damage.
Upgrade Base - Adds 25 points of structure to your base's maximum.
Energy Cell - Adds 15 points to your static shield's energy reserve.
Shield Bounce - Each level of this upgrade will increase the acceleration at which projectiles bounce off the shield.
Energy Infuser - Each level of this upgrade will increase the damage output of projectiles that bounce off the shield.
Sticky Shield - Projectiles will stick to your shield. Fire a stuck projectile by clicking your mouse button or pressing the space bar. Your shield can only catch one projectile at a time.
Static Shield - Your base will be protected by a constant all-around shield that draws from the base energy. Hits lower shield energy, which will regenerate slowly over time.