So, I've heard about Dwarf Fortress. However, due to my computer's specs, I can't play it. Until Clockwork Empires comes out, any ways to make my murderous video game superweapons a digital reality? Anything from industrialized torture to nuclear satellites would work. I just need replayability. (Also, I am actually suprisingly moral. I simply like a healthy form of catharsis. Fiery death is also satisfactory)
Evil Genius, maybe? It's not very replayable, but it allows you to vent your frustration upon the unsuspecting world, and those agents stupid enough to try and infiltrate your Evil Fortress of Doom.
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Many thanks to Assassin 89 for this avatar!
Mac version of DOSBox, grab Master of Orion 2 (with 1) from GOG, play as a species of bug monsters (Repulsive, Tolerant, Unification) and devour the galaxy.