Above: A megacolony
Potatoes.
ALL.
Of the potatoes.
I love Rimworld. It is the most addicting game I have ever played, and I used to play WoW for like... ever.
The game is this little delightful and utterly-stressful colony simulator. The main mod,Crashlanded, has three spaceship passengers crash land onto an alien world with the goal to rebuild their ship to escape. Ideally, you need to set-up yourself so you can survive until you have the time to rebuild your ship. Setting up growing areas and stockpile warehouses are essential the first day, as it can mean life or death within the next week as you only have so much food to start with.
Above: new colony being attacked by pirates
The combat system is absolutely amazing. Each NPC has a well-coded system for finding the best spot to take cover and lay down fire, and using algorithms that take-in the skills in combat, colonists can miss or hit their targets with great or terrible accuracy. Pirates come and attack, as well as androids. Sometimes, you are given the opportunity to save runaway NPCs from other towns and risk attack by their attackers. Combat is probably the most stressful thing in this game, as it takes time, effort, and resources for your colonists to heal after battle and rebuild as well as the frequency increases the larger and more successful your colony is.
Above: The Task Priority Menu
This game allows you to customize jobs specifically within your colony, allowing the most efficient run. It also shows which jobs each colonist is more skillful in (the bright boxes) as well as allows you add Manual Priorities, which gives you tiers of importance.
Above: Massive Battle between Colonists and Tribals
All in all, this game is an absolute masterpiece. Even though it is still in Alpha, it is practically a complete game. I didn't even get to include all the other goodies, such as the mentality-morality system and the secret areas.
If you want to grab this sucker, it's on Steam right now! Thirty bucks may be a bit much, but trust me. It's worth it.