Just an idea I had.
An empire-builder taking place in space rather than on any single planet.
The universe map is a 10 x 10 grid. Each square on this map of 100 squares is its own solar system, and each solar system can have anywhere from 1 - 10 planets. In other words, the universe can be anywhere from 100 to 1000 planets large! Each planet, furthermore, is divided into zones... and can have anywhere from 1-5. So, 100 * 10 * 5 = 5,000 provinces that can be taken over. Or, alternatively, there can be only 100 zones that can be taken over...
Players will start by choosing a solar system. The system will then be created at random - as all systems are when they are discovered!
Every starting system gets 5 planets by default, all of which are under the player's control. The total number of zones in the starting systems can only number between 25-30, to add some luck yet not screw anyone over too much.
Expansion
Players will expand 5 zones per turn, steadily spreading across the universe. You can expand into any neighboring solar system, however, doing so costs 2 claims rather than 1!
NPCs
There's a 25% chance every planet discovered will have inhabitants, and whether they are dealt with peacefully or militarily will be up to the empire. These states will, likewise, have space programs, but cannot hope to compete with the resources of empires already controlling entire systems! As such, they will be limited to expanding to either 20% of their total provinces or 1, whichever is more, per turn.
Uninhabited planets are auto-terraformed.
Planet Stats
A word document will be kept separate from the game - and be attached every update - that will detail the basics of each planet, such as...
When a planet is discovered, the player who discovers it gets to have some fun in creative terms, such as:
-Naming it!
-Detailing the race that lives there if it's inhabited
-The climate (dry, temperate, cold, etc.)
-The geography (mountainous, flat, oceanic, etc.)
-The resources (keep in mind I will start modifying your discovery if you keep popping wealthy places)
All this data will be kept track of in a separate file, and ordered by solar system for convenience.
Economics
Every zone generates 1 gold per turn for simplicity purposes. What you spend it on is up to you.
You can trade with new states you meet, but are limited to five agreements, and this is throughout the entire game. Trade gives you +100% of your friend's income. States located in zones along the trade route receive 50% of the trade's value! This allows little states to not be left too far behind.
Technology
The tech tree will be simple:
-Economics. Increases your output by 20% for each level you have, up to 100% for all 5. Every level costs 100, flat, to reflect exponential growth. So, it will cost 500 gold to fully max this out.
-Transportation. 4 levels, each costing 50n. Maxing out costs 500 gold. Each level allows you to move one more solar system, so you can move halfway across the game map if you have Transport 4! Likewise, each Transport level also allows you to colonise and negotiate that distance away, so Transport 4 allows colonies 5 systems away, contact with states 5 systems away, and your fleets to move that far as well.
-Military. 5 levels, each costing 50n, so 750 to max out. Each level gives you +1 in combat. And since this game has rolls on a scale of 1-10, this is important! Every military also adds +1 to your support limit for every zone you control.
-Civics. Effectively a measure of how evolved your state and its integrity is. 4 levels, each costing 25n, so 250 to max out. Every civics increases how many systems you can control without incurring revolt risk by 1. So, maxed civics means you can control 5 of the 100 systems. Soft power is your friend!
In total, it costs 2000 gold over the course of the game to max out all techs, but assuming 25 zones in the first system with 15 average in the other 4, you have 85 gpt, you can have all techs in 23 turns. While it will take a few turns to reach 5 systems, you also have trade, and of course, random goodies I will drop on you!
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More to be added (primarily combat and diplomacy options), but does it seem good so far? At the very least, there will be plenty of room for imagination. A planet of machines, a planet of Mobians, and everything in between!