The Secret Ant Missions are rather simple to get to, if you know where to look. You also must have the Counterstrike add-on for Red Alert. If you don’t, don’t waste your time reading the rest of this page.
Simply start Red Alert as you normally would. At the title page — the one shown above — hold down the left shift key and left-click on the speaker circled in yellow in the upper right-hand corner. The program will then ask you to select the difficulty level. After you have done this, a window will pop up asking you to insert the Counterstrike CD-ROM into your computer. Put it in, hit enter, and the Secret Ant Missions should automatically start up.