Google Play Achievements...
	Various Tips and Tricks...

Achievement	How to unlock
Area clear!	Complete a shaft.
Captain Specialist!	Unlock three Special Powers.
Clean House!	Complete three shafts.
Collateral Damage!	Kill three mutants in one shot.
Decked out!	Max upgrade all weapons.
Firepower!	Kill four or more mutants in one shot.
Gunpower!	Max upgrade a weapon.
Highscore!	Score higher than 50000
Killing machine!	Kill 200 mutants.
Major Specialist!	Unlock five Special Powers.
Medal of Honor!	Kill 400 mutants.
Mission Complete!	Complete 30 missions.
Mow Em Down!	Kill 50 mutants.
Objective Complete!	Complete an objective.
On a mission!	Complete 10 missions.
One down!	Complete a mission.
Own it!	Earn a level three rating on a floor.
Perimieter secured!	Complete two shafts.
Rating Boss!	Earn a level three rating on all Military Branch floors.
Rating Master!	Earn a level three rating on all Factory X floors.
Saving Bullets!	Kill two mutants in one shot.
Score!	Score higher than 10000
Shaft Specialist!	Earn a level three rating on all Medical Research floors.
Special Ops!	Kill 100 mutants.
Specialist!	Unlock a Special Power.
Ultrascore!	Score higher than 100000
Upgrade!	Upgrade your weapon.
Vending Destructor!	Destroy 10 vending machines in a mission.
Vending Vandal!	Destroy 5 vending machines in a mission.

Unlike rifles the RPG launchers may cost more than the rifles and do less base damage than the rifles. It's because RPG will explode upon impact, doing damage in a radius. Killing monsters refuels your abilities and provides you with income to purchase stronger weapons. Enemies randomly drop blue upgrade tokens that go towards leveling up your currently equipped weapons. When you're selecting a weapon to upgrade, consider that the more you use it, the stronger it will get. It's important that you keep moving in Xenowerk or you'll be dead in seconds. Keep in mind only a few enemies have ranged attacks in the game.