Command And Conquer: Red Alert 2 - Yuri's Revenge

Hint: Free Brutes:
You will need a Genetic Mutator and Slave Miners. Use the Genetic Mutator to mutate Slaves into Brutes. Because Slaves are free, your Brutes will also be free.

Hint: Eliminating an enemy base:
Make sure you have a Cloning Vat built before attempting this trick. Build the Yuri Prime. Since you now have two, take them to an enemy base and systematically take over the base. If they have a Prism Tower (Telsa or Gatling Cannon) and it is too far in the base to capture, just take over their power plants and sell them. You can take out any base with this tactic.

Hint: Build everything:
Note: The following trick only works for Yuri's side. First, you must have two allies, one Soviet and one Allied. Next, build everything you can build including Cloning Vats. Train a Yuri Prime. Since you have Cloning Vats, you will have two. Send one to your Allied allies and use Force Control to take control of their Construction Yard (hold [Ctrl] and click on it). While the Yuri Prime is still controlling the Construction Yard, build every thing you can with the Allies. Then, repeat the entire process again with the other Yuri Prime on your allied Soviets.

Hint: Keep construction yard:
In skirmish or multi-player mode, when you need a base and have a Yuri Prime, capture the Construction Yard, then click on it. After that, click anywhere on the map in the area. The vehicle is now permanently yours.