Command & Conquer: Red Alert 3 Cheats

If you want some special units to have some fun with in a regular battle, then just be the Allies! Here are the ways to get them:

Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
The Shrike and the Thorn (10 points): Complete Soviet mission 1 on any difficulty level.
Circus of Treachery (10 points): Complete Soviet mission 2 on any difficulty level.
Taking Back Ice-Harbor (10 points): Complete Soviet mission 3 on any difficulty level.
March of the Red Army (10 points): Complete Soviet mission 4 on any difficulty level.
The Science of War (10 points): Complete Soviet mission 5 on any difficulty level.
No Traitors Tomorrow (20 points): Complete Soviet mission 6 on any difficulty level.
To Tame a Living God (20 points): Complete Soviet mission 7 on any difficulty level.
The Stone-Faced Witnesses (20 points): Complete Soviet mission 8 on any difficulty level.
Blight on the Big Apple (20 points): Complete Soviet mission 9 on any difficulty level.
Ride of the Red Menace (10 points): Complete Allies mission 1 on any difficulty level.
The Shark and the Lure (10 points): Complete Allies mission 2 on any difficulty level.
The Famous Liberation (10 points): Complete Allies mission 3 on any difficulty level.
Enemy of Our Enemy (10 points): Complete Allies mission 4 on any difficulty level.
The Unfathomable Fortress (10 points): Complete Allies mission 5 on any difficulty level.
A Monument to Madness (20 points): Complete Allies mission 6 on any difficulty level.
Forever Sets the Sun (20 points): Complete Allies mission 7 on any difficulty level.
The Great Bear Trap (20 points): Complete Allies mission 8 on any difficulty level.
The Moon Shall Never Have Them (20 points): Complete Allies mission 9 on any difficulty level.
The Death of Father Frost (10 points): Complete Empire of the Rising Sun mission 1 on any difficulty level.
To Conquer Shattered Spirits (10 points): Complete Empire of the Rising Sun mission 2 on any difficulty level.
Behold the Shogun's Executioner (10 points): Complete Empire of the Rising Sun mission 3 on any difficulty level.
Graveyard of a Foolish Fleet (10 points): Complete Empire of the Rising Sun mission 4 on any difficulty level.
Assault on the Black Tortoise (10 points): Complete Empire of the Rising Sun mission 5 on any difficulty level.
Rage of the Black Tortoise (20 points): Complete Empire of the Rising Sun mission 6 on any difficulty level.
Barbarians at the Bay (20 points): Complete Empire of the Rising Sun mission 7 on any difficulty level.
Crumble, Kremlin, Crumble (20 points): Complete Empire of the Rising Sun mission 8 on any difficulty level.
The Last Red Blossom Trembled (20 points): Complete Empire of the Rising Sun mission 9 on any difficulty level.
Conscript (10 points): Complete all lessons in the tutorial.
Tempus Fugit (30 points): Complete all campaigns on medium or hard difficulty level.
Master and Commander (50 points): Complete all campaigns on hard difficulty level (also unlocks achievement for medium difficulty).
The Cleaner (30 points): Complete all bonus objectives in the Soviet campaign.
The Closer (30 points): Complete all bonus objectives in the Allies campaign.
The Conqueror (30 points): Complete all bonus objectives in the Empire of the Rising Sun campaign.
Tag Team (20 points): Complete 9 different online co-op campaign missions.
Dynamic Duo (30 points): Complete 18 different online co-op campaign missions.
Twin Tigers (40 points): Complete 27 different online co-op campaign missions.
Checkmate (40 points): Defeat a brutal-difficulty skirmish opponent on a 2-player map.
Hell March (30 points): Win battles on all original maps vs. skirmish opponents (medium-or-greater difficulty).
Sole Survivor (30 points): Win on 2-player maps vs. all 9 skirmish opponents (medium-or-greater difficulty).
Against All Odds (40 points): Win on a 4-player map vs. a team of 3 skirmish opponents (medium-or-greater difficulty).
Bloodsucker (20 points): Leech 7 different enemy weapons using Hammer Tanks in a ranked online match or skirmish.
Short Work (20 points): Win a battle in less than 5 minutes vs. a skirmish opponent (medium-or-greater difficulty).
Day of Judgment (20 points): Destroy 30 enemy units with an ultimate weapon attack in a ranked online match or skirmish.
Girl's Best Friend (20 points): Kill 25 enemy targets in 1 minute with a Commando in a ranked online match or skirmish.
Meat Grinder (20 points): Crush 20 enemy units in a ranked online match or skirmish (medium-or-greater difficulty).
Sword Saint (20 points): Cut down 15 enemy units with sword attacks in a ranked online match or skirmish.
High Speed, Low Drag (20 points): Arm 10 Multigunner IFVs with different weapons in a ranked online match or skirmish.
The Knowledge (20 points): Capture 6 structures in a ranked online match or skirmish (medium-or-greater difficulty).
The Spy Who Bribed Me (20 points): Convert 5 enemy units with a single Spy bribe in a ranked online match or skirmish.
Reign of Terror (20 points): Dismantle 4 enemy vehicles using the same Terror Drone in a ranked online match or skirmish.