Sweet! Just got the risky business badge by beating Europe in 19 turns. Here's a tip: make sure that you invade deep to put your airlifts deep into enemy territory. The sooner you disrupt German's reinforcements, the sooner you win. Good luck!
Good grief! Does anyone have any tips on insane? I abandoned Africa and focused on developing North America and Europe. I survived until turn 22 which I consider an accomplishment! They start pounding you on turn 11. Great game by the way!! 5/5
Here is some info about using anger.
I did some math experiments on a level and I figured out that you should only use level one gems to increase the waves (use anger). If you use level two gems, you only gain a little mana when the wave is dead. If you use a level three gem or higher, you actually lose mana.
So only use level one gems. If you want to face a tough wave, you can use two or more level one gems.
Also, don't use anger on a giant monster wave that only has two creatures (I usually died when I did this). However, it is a good idea to use two (or more) level one gems on a giant monster with 4 or 5 monsters in the wave because it gives you a ton of mana and exp.
This is prob. much more info. than you wanted but, hey, it's a cool, detailed game.
Believe it or not, I have won the gem of eternity but still cannot figure out what "kills in a row" means. Does that mean one hit wonder kills in a row or does it mean kills in a row without you doing anything? :\