Heat Signature
Heat Signature is a little bit stealth, little bit roguelike, little bit realtime, little bit sandbox, and little bit pause-and-think.
Overview
Heat Signature is a top-down game where you go on missions to infiltrate starships. The game is loosely real-time, but you can pause at any time to give a command, so it's a more thinky and less twitchy. The game is fairly unique so I'll go over some of the features.
Features
Stealth
If I had to pick a single genre, I would call Heat Signature a stealth game. For the most part you can't just go in shooting and dodging. You have to look at guard walking patterns, and often sneak up on them. Frequently you will try to avoid guards rather than kill them. While stealth is not my favorite genre, this game has the perfect amount. You quickly learn that all guards will do some sort of patrol, and it's pretty easy to guess their route. There is a fast-forward button so you can quickly advance the game to when that one guard moves where you want him to.
Roguelike
I hesitate to call this game roguelike, since the term is overused. However, you gain items and money and can experience permadeath.
Sandbox
There is a strange combination of sandbox and campaign. When you start, there are a lot of stations to unlock and it seems like the goal is to win by liberating enough stations. However, there is no urgency to it and not much story to drive that goal.
When you start a new agent, they have a personal goal. To me, this feels more urgent than the campaign goal. To complete the personal goal, you have to save a bunch of money to unlock a really difficult mission.
Beyond the goals of liberating stations and doing personal missions, there are achievements, defector missions, and codes of conduct. There is also potential to do unstructured challenges, or you might choose to only take missions from a certain client.
One way that it really tries to be like a sandbox game is to have some surprising interactions that you mostly discover accidentally. Like, you sounded the alarm and you only have 10 seconds to get back to your ship, but it's too far away. You think and think and realize there is a window near by. You shoot the window and get sucked into space. Fortunately, you have about 30 seconds to remote pilot your ship to pick you up. While not as rich as a true roguelike (like Nethack), there is a lot of fun things to learn to keep up the interest. On your first mission, you might have trouble killing one or two guards with a single gun. After a while, you can take on a group of five with just two wrenches.
My Take
I pretty quickly stopped caring about personal missions and unlocking stations. Without a larger goal, the individual missions became less interesting. The most fun for me was to do the defector missions. These are like puzzles where you do a mission with a fixed set of gear and don't impact the campaign in any way.
Should You Buy It?
I enjoyed it well enough but I played less than 20 hours, which isn't much for me. I found the game similar to FTL but I enjoyed FTL more. So, if you loved FTL and want something like it, give Heat Signature a try. If you haven't played FTL, take a look to see which one you think will appeal more.