The Sarcastic Raptor
Contra is a freeware modification for Command and Conquer Generals: Zero Hour real-time strategy game. It’s a big project started in 2004. It adds many new units as well as numerous new upgrades, new general’s powers and buildings. It also adds new sounds, maps, bug fixes, enhanced graphics, and other effects, as well as three new generals.
Link to the Mod : https://www.moddb.com/mods/contra/downloads/contra-009-final
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What worked for me is to just look for other supply piles/drops around the map and raid them right off from the start. Seize as many oil derricks as you can. Make smaller bases away from the main base so your main base doesn't become a sole target. Don't waste time sitting on your base. Macro as much economy as you can and don't let your opponents get them.