Atmos maps contain 6 alien species. As you progress through the maps, the strength of the alien enemies increases; Base maps have weaker aliens, while in the X2 maps you will find much stronger aliens.

Below is a table showing the rewards for each alien and their respective bosses, with and without premium.

Alien XP Cash PLD Regular PLD Premium
Scout 1 500 10 11
Sentry 60 1.600 30 33
Boss Sentry 120 3.200 50 55
Grunt 400 8.000 130 143
Boss Grunt 600 12.000 200 220
Hussar 1.800 36.000 600 660
Boss Hussar 3.000 76.000 950 1.045
Citadel 10.000 200.000 3.500 3.850
Hydra 40.000 600.000 15.000 16.500