Instead of turning into plasma along with all of humanity, as a result of the catastrophe that followed the salvo of an alien starship towards the Earth, I, in the company of two other fuckers, part-time scientists, found myself in the past, in a temporal loop ten thousand in length years. In addition, a physical trick has endowed us with a kind of ersatz immortality. Experiencing a certain feeling of antipathy towards the little green men, burdened by the lack of another worthy goal, our trio set themselves the task of speeding up the progress of human civilization, so that at the next contact with representatives of extraterrestrial races, they would meet them fully armed. Having previously created either the Death Star or a portable Black Hole generator for the disposal of individual galaxies. And everything would be fine. But the Neanderthals, Cro-Magnons and Atlanteans turned out to be not very useful material for experiments.

Author's notes: Sorry, the presence of abstract reasoning and complex sentences makes the opus not very readable for fans of dynamic combat