Alien Sky/Missions

Levels

 * Mission 1: They're Approaching - The introductory mission, only Missiles and Homing Missiles are available here, and this is the only mission where the first level is not a Transport only level.


 * Mission 2: Fire in Return - This level introduces some of the other weapons in the game, notably the Bot Launcher and the Sticky Mine, this mission also starts with a Transport-only level, which other succeeding missions will also follow.


 * Mission 3: Enemy Upgraded - This mission is where you will experience the first difficulty spike as Transports for example have increased attack speed, and Fighters are also slightly more aggressive, and the Medium variation of Smashers will start appearing, but nonetheless this mission shouldn't give much trouble.


 * Mission 4: Carpet-bombing - This mission is where Demolishers will become even more common, and Transports once again have increased attack speed.


 * Mission 5: Learn Sticky Mining - This mission acts as some sort of a tutorial and a demonstration to show you how good Sticky Mines are, and you could get up to 99 Sticky Mines as long as you don't get anything else, enjoy the abundance of Sticky Mines here and learn how effective they are for yourself, this mission also has a rare chance of dropping the Triple shot power-up and once you do get it, make sure you don't accidently downgrade, Medium Fighters will be introduced, and this mission will also feature a slightly altered formation of Transport-only levels which other succeeding missions will follow, Builders will also appear here


 * Mission 6: Builders Gone Wild - This mission introduces Transport-only levels where Transports will now starting moving even faster, but they won't fire yet, which other succeeding missions will also have, this is where Builders will also become more common, Razers are introduced, and Laser is commonly seen here.


 * Mission 7: Mass Destruction - The real introduction to Triple shot is this mission, Nukes are a common sight here, Heavy variations of Smashers will start appearing along with light Interceptors as well as Phantoms.


 * Mission 8: Special Forces - Heavy variations of Fighters will start appearing here, Green flame is common in this mission, and this is also where Four shot will become commonly available, Medium Barriers will be introduced and Corrosion will start to drop here, Emitters will also make their debut here in this mission.


 * Mission 9: Heavy Barriers - The heavy variation of Builders will be introduced in this mission, and all extra weapons will be available on this level especially Chain Lightning, an extra weapon that you won't see much.


 * Mission 10: Low on Ammo - The heavy variation of Interceptors will be introduced in this mission, and this mission will return to the very first variation of Transport-only level in Mission 1 except this time they can now fire and they also move faster, and Low on Ammo as what the name of the mission is, literally implies its name by making it so that every level in this mission will have limited extra weapon drop, the first 2 Transports that appear on the beginning of each level are the only aliens that will drop extra weapons, so if you fail to kill the other Transport or you failed to kill both of them, you won't have any or good number of extra weapons to use in the level as any power-ups that will be dropped for the rest of the level even from Transports are mostly only Weapon grade power-ups and Armor Plates, this mechanic applies to all level in Level 10 except the boss level, one of the stages contains 2 guaranteed Nuke drops, which means you can skip either the current stage and one more stage later or the next 2 stages with it, the boss in this level will also be extremely difficult so if you don't know how to dodge well, you must have a great number of lives first before fighting the boss.