Your lab, your rule

You're the lead scientist in a hidden underground lab. The world thinks your work ended years ago — but it didn’t. Your assistant, Virellia, has kept everything running: the experiments, the virus, the vault. Now you’ve returned, and everything is waiting. You hold the power to end the world… or reshape it. What happens next is entirely up to you. (Yeah, if you find this familiar, it's probably inspired by it, a bit shameless on my part :P)