The best alternatives to Tharsis are Flee Earth, Solar Idle, and City Racing. If these 3 options don't work for you, we've listed a few more alternatives below.
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Flee Earth is a game where you control a UFO that’s escaping Earth. Watch out for the incoming asteroids! Clicking the screen will move the UFO either left or right. The game becomes more challenging as you progress. Good luck, and godspeed.
Solar Idle is a free idle iOS game that players buy, build, upgrade, and colonize planets - including the sun. Not only is it an idle game, Solar Idle features a build in arcade where players can play various arcade games to increase earnings.
Help Manohar, our teenage alien, to survive in space on his quest to explore the rogue planets. ★ Beware of the guided missiles ★ Collect ORB to gain a shield ★ Collect LIGHTNING to Zap all incoming threats ★ Collect stars to increase your score