2 days: max research, max accuracy, max reload, sniper, max money, max regen, max health, x-ray, max tree. Stay in front of the research and use it every reload. 3 pistols kills bug, 6 kills miniraptors, so at the start shoot only when you're sure you'll hit (enemy right in front)
Smoke Bomb just reinforces my belief that teleport will always be overpowered. Low cost, but absolutely hax. Esp on CTF, where you grab the intel and tp instantly, which will always move you closer to your end. Also, great for camping snipers if a tank or three charge you directly.
INFILTRATORS!!!!!!
Goddamn Infiltrators. Sure later-game they aren't a problem, but early on without equipment they slow your whole party without having a hit landed on them.
A good Survival team is ShadowDragon (DPS), SoulSeeker (Push back melee), ShadowKiller (Hits all enemies), EntropyAlien (Healer+Guard). Aka the reason why melee is no longer used in warfare.
Last level: "We need a hero for this one man misson"
Or a single spy to pick up the stars after you level the place with the ten+ airstrikes you've been saving.
Hint for the last level (really, all bosses): Fully upgrade your Barracks, Spells and Wizards. Use only Paladins from your Barracks, as they are the only unit that can take one hit of the last boss and survive (and then heal, so it really takes 2-3 hits from him to kill them), and a mix of both wizard types, but a few more Arcanes towards the level end. Start the boss wave insantly with a meteor swarm, then zerg rush with reinforcements. As soon as his health bar seems gone, prep the meteor swarm that should have charged by now. Second form has a larger hitbox, so meteors are more effective.
WARNING, on the level where you have to find the Grenade Launcher schematics, make sure you have 400 dollars before you move on to the next level. Otherwise, the following level becomes an exercise in both trial and error and boredom (3 massive enemies that can only be hurt by grenade launcher or explosive barrels, and they don't take up squares like other enemies so you can't ever tell if they are in range of the 3 (and only 3) explosive barrels on the level).
On a related note, I wish you could sell weapons (reach that level with 350 dollars and 3 assault rifles and a sniper? oh dear oh dear, have fun with retrying the hour long level four times)
If your companion is killed too close to the start of an area, your character will not be able to revive them with "G" as he won't have room to pick him up. If a horde of zombies comes out of a level entrance behind you, make sure to pull your companion back a few steps from there unless you want a permadeath. Just wanting to warn others, as it happened to me twice before I realised what was happening.
2 knights, an archer and a wizard make the last battle a bit too easy (the knights can kill the enemy knights and wizard quickly, and two ranged units can push the king to the far right and hold him there)
 "Death vs Monstars 2"){kind=icon}
 "Endless War 6"){kind=icon}
 "bit Dungeon"){kind=icon}
 "Knightmare Tower"){kind=icon}
 "Nuclear Plant"){kind=icon}
 "Strike Force Heroes"){kind=icon}
 "Reactance 2"){kind=icon}
 "Boss Slayer"){kind=icon}
 "Monsters' Den Chronicles"){kind=icon}
 "Stealth Hunter 2"){kind=icon}
 "Kill the Heroes"){kind=icon}
 "Pocket Creature"){kind=icon}
 "City Siege 3: Jungle Siege"){kind=icon}
 "Versus Umbra"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Cursed Dungeon"){kind=icon}
 "XenoSquad"){kind=icon}
 "The First Hero"){kind=icon}
 "The Last Stand: Union City"){kind=icon}
 "The King's League"){kind=icon}
no!