My experience with Let Them Come changed over time. From enjoying it, to hating it, back to enjoying it, and eventually nonplussed. It’s not terrible, but also not great, and clearly not designed for console. In essence, you are a man on a big gun turret. You use the left stick to move the turret up and down, and pull the trigger to fire. Aliens rush at you. This is the entire game. If it sounds unintuitive, it is but it’s not insurmountable. It feels like it was built as a keyboard flash game.