I like the idea of achievements and medals. For most of the ones I could think of, people who are winning are gonna win the secondary goals too... For achievements, people could work together for most of them I guess, I dunno if that's a good thing or a bad thing.
Medals
- Most captured specialists
- Furthest distance traveled
- Most map visibility
- Most drillers produced (like you mentioned already)
- Highest production rate
- Most opponent drillers destroyed
- Fewest opponent drillers destroyed
- Longest range, successful attack
Achievements (could be pretty much anything)
- Use 4 saboteurs in 1 game
- Destroy 100 drillers with a sentry in 1 game
- Win 5 sub-to-sub combats in 1 game
- Destroy opponent 500 subs in 1 game
- Don't initiate any attacks in 1 game
- Destroy 1,000 drillers (10,000 drillers, 20,000 drillers, etc.)
- Capture 5 opponent specialists in 1 game
- Have 200 shields present at 1 outpost
- Have at least 10 specialists, but none at the same outpost