This may seem like a lot of points, but it's not too difficult to get on any difficulty.
- As your combo rises, a multiplier is added. Keeping a consistent combo is key to gaining a high score. Your combo lasts a very short time (about 1 second). Do not stress if there are breaks between combos with small amounts of enemies.
- Shoot torpedoes & missiles at the bigger ships while shooting the smaller ships. This will increase the combo and will net you higher numbers.
- To Scan for invisible enemies: Hold . What this does is uncover any invisible enemies near the scanning cone. If you hear a faint "woo-wooooo...woo-woooooo..." that means there is an invisible carrier in the area. Find and kill it for 75,000 points, more if there's a multiplier in effect.