Alien Hallway Unlockables & Awards

Achievements

  • Air force Upgrade airstrike till 7th level
  • Air supply Use airstrike 100 times
  • Armada Call for 50 friendly units
  • Blood Lust Kill 100 aliens
  • Bloodbath Kill 1000 aliens
  • Elite only! Call for 5 Heavy laser gunners during the battle
  • Extreme Win the battle with lower than 50% health level of your base
  • Fire in the hole Throw 300 grenades
  • Good start Liberate the first planet
  • Great commander Upgrade all friendly units till 4th level
  • Hell Call for 20 Flamethrowers during the battle
  • Invincible Complete any level of the last planet without loss of friendly units
  • Liberator Complete all game levels
  • Master of defense Upgrade the base till 5th level
  • Mean Accumulate 1000 energy units during the battle (can't be achieved on "Resources refill" and "Final Step" levels)
  • Numerical Superiority Call for 20 friendly units during the battle
  • Perfectionist Get 5 stars for all game levels
  • Phantom warrior Have 10 Snipers simultaneously present during the battle
  • Professional Complete the game on extreme level of difficulty
  • Specialist Upgrade one unit till 10th level