New achievements needed like
win a game without losing a titan or capital ship
win a game without losing a single planet
win a game without building a superweapon or starbase
Good ideas, also worth throwing into the suggestions pot:
* One Titan to rule them all :- Get your titan to the highest level (equiv of Capital Ship Captain)
* Clash of the Titans :- Destroy X titans (value of X should be hard but not impossible)
* Flagship of the empire :- Win the game with a Titan and frigates only (no capital ships)
* Diplomatic Alliance :- Win the game with an ally at max relationship points
* Doomsday weapon :- build max number of super weapons
User45701's last one probably could be split up
* Non-proliferation treaty : win a game without building a superweapon
Would have like to have called the no-starbase achievement "Best offence is the best defence" but that's already taken.
I must admit I've never even bothered to try for the civ/military only research achievements, mainly for the same reasons as the original post.