Some more ideas to differentiate Drox 2:
- Populations and ground combat: in Master of Orion, ground combat is a separate layer. Races could conquer each other, first destroying their ships and defense structures, and then conquering. Each planet could have both its population and its 'infrastructure' or 'bases'. Once the ships are destroyed and the infrastructure is as well, the planet needs to be conquered via armies transported on ships.
- The player cannot destroy a population completely except by accident or using a doomsday weapon: firing at a planet destroys only the infrastructure. Once the infrastructure is completely destroyed, the planet cannot produce anything, though some population remains.
- Races could then enslave the population left over by other races. Rebellions could happen far more often when a population is left by another race. Some races would annihilate the remaining population, and others would enslave it.
- Races would have different levels of proficiency at hand-to-hand combat, with the Brunt and similar races dominating.
- Race policies: it would be interesting if different races occasionally made decisions about policies other than just conquering planets and attacking races (they currently sort of do with building stations). These events would particularly make end-game (of sectors) interesting, sparking new quests from the Drox guild and from races.
- Holy crusade: a religious race could decide it had to conquer certain planets (especially ones previously owned), or decimate certain races.
- Evil empire: a militaristic xenophobic race, once powerful enough, could decide it wanted to eliminate all life in the universe.
- Secret weapon: a technologically advanced race, once threatened and weak, could try to build a secret weapon that destroyed planets.
- Slave gathering: a strong slave-oriented race would try to enslave most of the sector.
- Pollution: heavy industrialization could produce pollution on planets. Races need you to cart the pollution away. Pollution limits food growth and increases disease. Pollution could also cause planets to 'fight back' as in the game Alpha Centauri. Dryads (and other environmentalists) would particularly hate pollution and would like to enforce green limits in the sector.
- Federation policies: federations would have more meaning if they met and made decisions every certain amount of time. They could have a list of policy choices, such as food being provided by one member to another, or an embargo on a race, etc.