Invisible, Inc is a game with mostly simple mechanics, but also involves a deep tactical play-style, so it may seem difficult at first. However, following this guide and the in-game Tutorial should help you keep the team alive and able to safely reach the exit.
The goal is to infiltrate various companies and buy, sell, and steal as much as you can in 72 hours to prepare your agents for the final mission. Even a single hit from a weapon is always fatal for your Agents, so you must rely on stealth to get what you need and escape alive.
Game Screen and Interface HUD
Pressing the Space Bar will toggle between Tactical View (which shows where you are able to move your available agents) and Incognita's View (which allows you to hack electronic devices to disable their Firewalls, among other things). Firewalls must be cracked using Incognita's View unless a nearby agent has an item that can do it manually.
Pressing ALT will give you a better view of the map. Use this when planning your route to be sure that you do not miss objects (such as those still inside a safe), to view doors that may be hidden from view or when maneuvering around objects.
In every level is a metre that shows the current Alarm Level. The Alarm Level starts at zero and goes as high as six. It rises at the end of each turn and in certain situations, such as killing or being seen by a guard, a guard finding another guard unconsious or dead, and being seen by a camera.
When the Alarm Level goes up, additional security measures are enforced. This often results in more cameras being activated, or more guards being sent in.