(EA App/Steam) : Electronic Arts recently released the entire collection on Steam and the EA App. It is frequently on sale for a few dollars, includes the expansion, and is pre-patched to run on modern systems.
Furthermore, the modding community has kept the game alive for decades. Massive projects like Mental Omega expand the game far beyond its original scope, adding hundreds of units and entirely new campaigns, proving that the engine is as robust as it was twenty years ago. Navigating Modern Compatibility (EA App/Steam) : Electronic Arts recently released the