Possible Future Projects:
1. Naval ships, both floating and submersible (civilian (tankers) and military)
- Most garden worlds would likely have large oceans, water is a great heat sink and/or shield, so there's reason to make those even in the era of orbital bombardment.
2. Rapid-digging machines (small), Digging machines (large)
- basically, digging machines that can dig through almost any type of known material, varying sizes of them. Exploring various options (conventional drills, rapid-fire lasers, mass effect shenanigans?, etc) will at least break into the field.
3. Underwater Cities (Shallow): Self-contained cities capable of being built to a maximum of 100 meters. A proof-of-concept in many ways, and a springboard for future efforts and research. Said cities will have as many self-sufficiency measures into them as is possible, and will be designed in a modular fashion so future expansion will be easier. High energy efficiency and recycling will be critical to sustaining even moderately-sized populations (over 1000).
3a. Underwater Cities (Deep): Now that the basics of shallow-water cities have been established, refining said measures to withstand the pressures and environmental challenges deeper in the depths will further widen potential colonization possibilities. Said cities will have as many self-sufficiency measures into them as is possible, and will be designed in a modular fashion so future expansion will be easier. High energy efficiency and recycling will be critical to sustaining even moderately-sized populations (over 1000). (Prerequisite: Underwater Cities (Shallow))
3b. Underwater Cities (Super-Deep): Designing underwater cities that can withstand the most punishing and brutal of environments will of necessity render them capable of taking tremendous damage and withstanding enormous strains. Said cities will have as many self-sufficiency measures into them as is possible, and will be designed in a modular fashion so future expansion will be easier. High energy efficiency and recycling will be critical to sustaining even moderately-sized populations (over 1000). (Prerequisite: Underwater Cities (Deep))
3a. SSTO-capable, sublight-capable, FTL-capable Starship-Cities (ie Atlantis ripoffs): Combining the basic concepts of Underwater Cities (Super-Deep) and advanced starship engineering technologies. Said self-contained sities can land on the surface of or the oceans of any potentially habitable world, making interstellar colonization much much easier. As well, the more people live in cities like this, the less of a true need humanity has for planets or moons, as literally we can just up and leave anytime we want as circumstances dictate. (Prerequisite: Underwater Cities (Super-Deep), Advanced Spacecraft Design (Huge) AT MINIMUM, (insert FTL drive here) III AT MINIMUM, etc)
Going off of my list:
Spaceship Technologies: (Prerequisite: Carbon Nanotubes I)
- Spacecraft Design (Tiny): 0-250 meters, basically.
- Advanced Spacecraft Design (Tiny)
- Spacecraft Design (Small): 250-500 meters, basically.
- Advanced Spacecraft Design (Small)
- Spacecraft Design (Medium): 500-1000 meters, basically.
- Advanced Spacecraft Design (Medium)
- Spacecraft Design (Large): 1000-2000 meters, basically.
- Advanced Spacecraft Design (Large)
- Spacecraft Design (Huge): 2000-5000 meters, basically.
- Advanced Spacecraft Design (Huge)
- Spacecraft Design (Gigantic): 5000-10,000 meters, basically.
- Advanced Spacecraft Design (Gigantic)
- Spacecraft Design (Gargantuan): 10,000-20,000 meters, basically.
- Advanced Spacecraft Design (Gargantuan)
- Spacecraft Design (Brobdingnagian): 20,000+ meters, basically.
- Advanced Spacecraft Design (Brobdingnagian)