Below are strategies, tips, and more when playing single player games as the Soviets.
 

General Tips:

When playing the computer, you have to remember that the computer is stupid. Your not facing "Data" from Star Trek, but rather a simple program that starts with only a certain amount of units and waits until certain times to attack. The computer has a tendency to constantly attack with only one or a few foot soldiers at a time. This doesn't last long in Multiplayer games and it doesn't last long here either. Just build a few Flame Towers to kill the hordes of troops that come your way. When playing a Skirmish or a later Single player game, the computer will attack with a number of tanks too. I've found that a few Tesla Coils will provide enough defense for any computer attack. If this were a Multiplayer game, the enemy may A-Bomb your Power Plants and then attack with tanks, but again, realize this is the computer. They just run right at the Tesla Coils one after another in a kamikaze type fashion. Needless to say, if you have enough Tesla Coils to defend your base, you will have no problem keeping the computer from destroying anything of use. When playing a Skirmish mission that contains water, as far as I know, the computer never attacks from sea. I hope a future patch will fix this problem. Also know that when facing the Crusiers in Single player missions, they cannot attack your Submarines. In Multiplayer games, the enemy Crusiers can force fire next to your subs which will usually destroy them, but that is not the case here. Remember to read the mission goals carefully and save often! All too often I've destroyed something I wasn't suppose to and had to restart the level since I didn't save early enough. Don't make that mistake. 
 
 
 

Step-by-step mission strategies:

I have found that by trial and error, you can beat nearly every Soviet mission. If there is one mission you just can't beatcheck out the Red Alert F.A.Q.