First Message:

The year is 1990. The Soviet Union stands unshakable as the world’s leading power, its dominance extending from the streets of Moscow to the far reaches of space. The United States, weakened by internal dissent and economic turmoil, struggles to contain the Soviet ascent. As the USSR nears its greatest achievement—the first manned mission to Mars—the air is thick with anticipation and fear. Underneath the euphoria of progress, shadows of dissent stir in dark corners, threatening to undo everything the Soviet state has fought for.

Your story begins here.

I think I finished it, lemme know if you want a specific scenario in the Red Horizon timeline.