

Cool Gate: The large, round gates built by the ones who also built the portal.However, if you stray off-course, you get immolated mid-air. You can also climb the steel tower that's standing on flowing lava. You get immolated when you touch the lava, but you can jump right over it. Convection, Schmonvection: Played almost straight in The Inferno level.Wherever there's an inactive alien generator, a bunch of green fuel balls is always lying nearby. Oxygen only gets low close to oxygen sources. Whenever there's an unscalable cliff, there'll be a building with a bottle of jetpack fuel, which always runs out right after you finish the area you need it to traverse. You randomly land on a planet where the USSR found a portal delivering them there decades earlier. The woman was named after the eponymous character. Chekhov's Gun: The astronaut finds a copy of Alerkei Tolstoi's Aelita (classical Soviet sci-fi novel).Bilingual Bonus: The woman actually gives you tips and warnings.Beautiful Void: Aside from the woman, the planet is completely empty.Ancient Astronauts: The original inhabitants of the planet, who built the gates, apparently come from another planet.Because of the time dilation with regards to using the portals, they are simply viewing Earth from many years into their future. Alien Geometries: At one point there's a log from the Soviets, in which they glimpse what they think is this through the portal, because the results are visually bizarre.Averted in the end, with the woman allowing herself (with her genetically-modified ability to regrow the local moss) to be absorbed back by the planet, restoring it to verdancy. Turns out, everything else on the planet either fed off the moss or fed off that which ate the moss. The human's exploitation of the local moss ('Green Fire') introduced a virus into it, setting off an ecological downward spiral. Somewhat weakened, plot-wise, because the warnings only pop up in areas close to where oxygen replacement modules are found.Almost Out of Oxygen: Happens periodically throughout the game.An Aesop: Even with the best intentions, meddling with an unknown ecosystem might have disastrous results.It follows the exploits of an astronaut who has crashed down on what was thought to be a lush planet, but has turned out to be a barren wasteland, devoid of life save for the remnants of a Soviet colony and a mysterious woman wandering around the landscape.
