Easy mode win: (works best from after you beat a few levels)
Ships: Interceptor, Miner, **Ship of your choice**
Upgrades: Ship Weapons, Missiles, Beams (Then everything relating to the ships + Structure regen). No upgrades to turrets.
Strategy: -With this method turrets are not necessary-
Build a Reactor, spam Interceptor (quick win with Duels and Skirmish). To win defense, build interceptors + miner (priority on miners)
Now you will be getting loads of energy - build a capital ship of your choice and sit back and watch the massacre.
Final Mission **spoilers**
For me it was a defense mission with the last two Capital ships. Use the miners for energy and build the exact two ships for yourself. You spawn them faster than they appear ^_^
More or less the same strategy I listed below will work for Hardcore mode :-/ Only difference is that I lost 5 lives: If I had to play the game again -I'd probably build 2Flame:1Cannon STRICTLY. There's a wave where fire does absolutely nothing to them (I think 250,000 resistance to flame)
But seriously 4 Flame towers at max reload rate will obliterate ANYTHING (Else) What the description doesn't tell you is that the burn effects stack! :D I stacked over a ~2 million damage/sec with the final boss!
a wee bit too easy, infact the game gets progressively easier with the 3 levels. FOOL PROOF PLAN: Well placed Sniper & Frost (build frost\cash stat first)
When you get the money - Firetowers (1 is good enough)
Then Gold towers for fun.
Finally Flame (3 is enough)
Of course this is based on "Normal" gameplay
3.6 million, and I might've clear 4 if not for that damn UFO.
How I did it:
-Armour Tank
-Golden Gun
-Chest bomb
-Missile
-A LOT OF NUKES!
Get all the medals, although I got this score without the Obsession medal though. Blast off, fall, reach the purple layer, shoot, he'll go up to +1600ft, then crash down and bounce back to about +400feet, crash again and he'll linger around the purple sky again, so Blast his @$$ and repeat till your out of bullets. I use the missle on the last bullet when does his last +400 feet. AFter that hope you get a reload of bullets. Spam the nukes, (when you're high up the nukes blast you slightly higher, so you maintain height)
not really, i came close to the impossible badge.. got hit maybe 3 times for the entire game... wish there was more to it... hope they make an upgrade with more gfx, weapons, sounds, specials, and the ability to boost agility\speed... oh and an arcade mode and level select mode (for make the impossible badge less of a hassle)
My basic tips:
Scenario 23: Juggle Technique, you're forced to learn it and use it here.
Scenario 24: Upgrade key strategic points, hold down "N" to spawn all the creeps at once and use the mouse with the "F" key to fire off the towers. (Crazy but it works, I made a bare escape of 2 lives that way, I've seen others come out with more lives)
SA4 Badge: Obviously killing them quickly is the key. The most important thing is making a killzone to kill many creeps in a short designated part of the maze, so manipulate movement so that all 4 sides enter your maze at approximately the same time. (Area\Group damage towers will then pwn in your maze's sweet spot all at the same time) How you set up you death valley is up to you but the important thing is timing to get them all. -You may have to utilize juggling and juggle the creeps in the sweet spot as you wont be able to finance a long high powered maze.
---I feel to ease in the pain of level 24 scenario, there should be a shortcut key for "Fire"---
I haven't played in a while but I believe it's "F"
Also there are a few videos on youtube for defeating the hard sceanrios.