It was 2015 when I first saw the developer of the game Let Them Come [$1.99] describe what his game would be about in our Upcoming Games forum, and I've been keeping an eye on the game's development ever since because the idea at its core was pretty smart and its visuals retro in a good way. After a long journey that took a detour to the lands of Steam, Let Them Come has finally hit the App Store, and I'm glad to say that it lives up to my expectations in terms of gameplay. At least so far; I haven't been able to get too deep into the game because I keep getting this weird crash that ruins my runs and has me start all over again. That crashing issue aside, Let Them Come appears to flesh out its simple concept very well.

What is that simple concept" In Let Them Come, you play the last survivor of a mission gone sour; you are the last survivor of a group of soldiers dispatched to take out an alien threat aboard a spaceship, and you've decided that if you're going to go down, you will take as many of those alien creatures with you on the way. So, you set up your huge machine gun at one end of a dark corridor and wait for them to come. And boy do they come in waves. You aim your machine gun using a slider on the left side of the screen and shoot by tapping (or holding) the various buttons on the right side of the screen. You can bring along two types of ammo, two secondary weapons, and four passive upgrades on each run, so there's variety in how you approach each attem...