Here you play as the Defender of the ten Kingdoms. Your mission is simple – to protect them from all alien attacks. To do that – you have to destroy all invading forces.
Different weapons are at your disposal – pistols, machine guns, mines, lasers. After each repelled attack – you can upgrade your abilities and weapons.
The enemies walk to you in tower-defense style, but you have to actively shoot them.
This game can be played offline, it has 10 levels and it is free.