Xenonauts is described as '1 October, 1979: Unidentified forces presumed of extraterrestrial origin arrive in Earth orbit. Panic spreads across the globe as attempts at communication fail and attempts to engage the invaders are met with heavy losses and little success' and is a Turn Based game in the games category. There are more than 10 games similar to Xenonauts for a variety of platforms, including Windows, Steam, GOG.com, Linux and Mac apps. The best Xenonauts alternative is X-COM. It's not free, so if you're looking for a free alternative, you could try Fire Emblem or UFO: Alien Invasion. Other Xenonauts like games are Othercide, Into the Breach, Valkyria Chronicles and Shadowrun Returns.
XCOM is a series of sci-fi video games surrounding an Extraterrestrial Combat Unit setup by the nations of Earth to combat an alien invasion.
Descend into Humanity’s last hope. The Daughters, echoes of the greatest warrior to ever live, are all who stand before Suffering and death.
Into the Breach is set in the far future where humanity fights against an army of giant monsters collectively called the Vek. To combat them, the player controls soldiers that operate giant mechs that can be equipped with a variety of weapons, armor, and other equipment.
"Fire Emblem" is now synonymous with Simulation RPGs. The opening of the first game, "Fire Emblem: The Shadow Dragon and the Blade of Light", begins with the following characteristics.
MAN MEETS MAGIC & MACHINE. The year is 2054. Magic has returned to the world, awakening powerful creatures of myth and legend. Technology merges with flesh and consciousness. Elves, trolls, orks and dwarves walk among us, while ruthless corporations bleed the world dry.
UFO: Alien Invasion is a strategy video game in which the player fights aliens that are trying to take control of the Earth. The game is heavily influenced by the X-COM series (mostly by UFO: Enemy Unknown).
You and your mercenaries have to reclaim the island sector by sector, turn by turn. Cultivate the Fallow Trees and process their juices, as they are the basis for your funding. Hire better mercenaries, train local militias and manage your equipment wisely.
Invisible, Inc. is a turn-based tactics stealth video game incorporating elements of roguelike gameplay, developed by Canadian independent studio Klei Entertainment.
Battle Brothers is a turn based tactical RPG which has you leading a mercenary company in a gritty, low-power, medieval fantasy world. You decide where to go, whom to hire or to fight, what contracts to take and how to train and equip your men in a procedurally generated open...
Pathway is a turn-based strategy game designed to provide players with approachable, fast-paced and fun squad skirmishes in an early 20th century pulp-adventure setting. Quickly run for cover, flank enemies and utilize your team’s special abilities to turn the tide of battle in...
Underrail is an old school turn-based isometric indie role playing game that focuses on exploration and combat.
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The xenonauts game wouldn't have happened if xcom hadn't happened first.