Want a tactical and strategic tower defense challenge that's packed with options and upgrades? Take command of the dropship Sentinel and do battle across a vibrant sci-fi world.
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Campaign Mission 143.5%
Complete campaign mission 1
Campaign Mission 240.4%
Complete campaign mission 2
Campaign Mission 337.4%
Complete campaign mission 3
Campaign Mission 434.9%
Complete campaign mission 4
Campaign Mission 532.6%
Complete campaign mission 5
Campaign Mission 627.7%
Complete campaign mission 6
Campaign Mission 725.5%
Complete campaign mission 7
Campaign Mission 823.4%
Complete campaign mission 8
Campaign Mission 922.3%
Complete campaign mission 9
Campaign Mission 1021.4%
Complete campaign mission 10
Campaign Mission 1120.3%
Complete campaign mission 11
Campaign Mission 1219.9%
Complete campaign mission 12
Campaign Mission 1319.0%
Complete campaign mission 13
Campaign Mission 1418.5%
Complete campaign mission 14
Campaign Mission 1517.6%
Complete campaign mission 15
Campaign Mission 1617.0%
Complete campaign mission 16
Campaign Mission 1716.7%
Complete campaign mission 17
Campaign Mission 1816.4%
Complete campaign mission 18
Campaign Mission 1915.7%
Complete campaign mission 19
Campaign Mission 2015.3%
Complete campaign mission 20
Campaign Mission 2114.9%
Complete campaign mission 21
Campaign Mission 2214.8%
Complete campaign mission 22
Campaign Mission 2314.5%
Complete campaign mission 23
Campaign Mission 2414.1%
Complete campaign mission 24
Campaign Mission 2513.4%
Complete campaign mission 25
Campaign Mission 2612.9%
Complete campaign mission 26
Kill 50 Aliens44.0%
Kill 50 enemies
Kill 500 Aliens38.8%
Kill 500 enemies
Kill 5000 Aliens29.5%
Kill 5000 enemies
Kill 50000 Aliens17.9%
Kill 50000 enemies
Kill 500000 Aliens4.5%
Kill 500000 enemies
Build 10 Turrets41.7%
Build 10 turrets
Build 100 Turrets30.1%
Build 100 turrets
Build 1000 Turrets16.0%
Build 1000 turrets
Turret Engineer9.4%
Fully upgrade a turret in the armoury
Fully Operational Mothership3.3%
Buy every upgrade in the armoury
War Machine8.7%
Reach maximum level with any Commander
Nexus Recruit16.1%
Reach Nexus rank 5
Nexus Sergeant12.2%
Reach Nexus rank 10
Psycho Campaigner4.9%
Finish the campaign on Psycho difficulty
Defender Defender10.8%
Complete level 6 (Alliance) without losing any Xenite defenders
Path Defender8.1%
Complete level 2 (Fortification) using only path deployable weapons
Laser Spammer6.2%
Complete level 10 (Titan) using only Laser Turrets