Apparently you can restart level 5 from the main menu without actually playing levels 1 through 4. And it ends fast. And gives you the badge. For this, for my headache from 3D, and for being an interesting concept, I give 3/5.
Argh. There needs to be an indurance badge, for getting all achievements. Darn housings refuse to crop up, and their best one requires 1000 housing spawned workers.
A recipe for disaster - dual machine gun (damage-damage-speed in top slot), damage buffer (damage to 50% in bottom right slot), shield gun (hp, target damage buffer, in middle slot), sniper gun (total damage 30 minimum, 40 is better, in back slots) make for a very solid defence.
Machine gun goes quickly to damage 3, and tops at damage 5. Its position is rarely attacked and is highly effective aganist airplanes, blimps and final boss. Sniper 30 is enough to one-shot flying barriers, and 40 is enough to 1-shot elephant flyers. Positioning them in the back keeps them off the harm's way. Shielded buffer is immune to bullets which it is main target of, and shield gun is effective in tanking most that's left.
Heh. Yet another mostly-pointless suggestion. Use 2 turret decoys, 1 3-shot autocannon, 1 air minefield and 1 artillery tower. Upgrade 3-shot cannon to damage 3 (2 times), other towers to damage 20, and increase the number of mines. Result - autocannon can punch through all armor, except when enemy is shielded. Minefield provides a perfect smokescreen aganist shells and mini-drones and airplanes, and aims for the underbelly. Artillery plain punches through anyone and everyone.
Sooo, it means that the Evil Mastermind is - the Mayor, who is Left-handed, Embezzling money, and an Impostor! Phew, and all I had to do is find THREE secret cult leaders, a Minister cigar smoker with a secret affair, and a short-tempered underworld criminal General. Man, the city is sure fond of its cults! :D
I agree with Tarantus, using Valkyrie is how I beat both stage 20 and Loki. Best thing is that it allows, mostly, to hit 200k+ chains with impunity, making you get halfway there for an encore.
Very nice, especially since you can easily make a nigh-impenetrable defence with the starter blocks (Sleeper, Poison Gas, Slow, See invisible, Atk, Cursed).
It's a pity that shield booster and flak cannon are both on opposite sides of the base. Those are the most awesome of your buildings... And the game goes immediately downfall if one of them dies.
My brother played the same game and complained that necros were hard to kill. Naaaah. Just put a fully upgraded ranger tower and research entangle to level three. Bonecrushing!