Use towers, traps, and guns to repel spaceship boarders in tower defense-shooter hybrid Sentry

n indie tower defense/shooter hybrid that hit Steam Early Access late last month is getting pretty positive reviews from early players. In Sentry your job is to defend a ship of frozen human survivors fleeing alien attack by setting up a gauntlet of traps, tricks, and environmental hazards between enemy boarders and the energy core of your ship...
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