Games like Xenowars
Games like Xenowars include Sid Meier's Civilization®: Beyond Earth™, Starfield, Fallout 4, BattleTech, and Fallout: New Vegas. We matched them by the tags players give Xenowars on Steam (RPG, Aliens, Turn-Based Strategy, Space, and Hex Grid): closest matches first, and among equally close ones the better-known games.

Sid Meier's Civilization®: Beyond Earth™
Shared: Turn-Based Strategy · Strategy · Space

Starfield
Shared: RPG · Space · Exploration

Fallout 4
Shared: RPG · Exploration · Adventure

BattleTech
Shared: Strategy · Turn-Based Strategy · Mechs

Fallout: New Vegas
Shared: RPG · Exploration · Singleplayer

XCOM: Enemy Unknown
Shared: Turn-Based Strategy · Aliens · Strategy

XCOM®: Chimera Squad
Shared: Turn-Based Strategy · Strategy · Aliens

ENDLESS Legend™
Shared: Turn-Based Strategy · Strategy · RPG

Stellaris
Shared: Space · Strategy · Sci-fi

STAR WARS™ Knights of the Old Republic™
Shared: RPG · Sci-fi · Adventure

Wartales
Shared: RPG · Turn-Based Strategy · Strategy

Warhammer 40,000: Rogue Trader
Shared: RPG · Turn-Based Strategy · Strategy

King's Bounty II
Shared: RPG · Turn-Based Strategy · Strategy

No Man's Sky
Shared: Space · Exploration · Sci-fi

XCOM 2
Shared: RPG · Strategy · Sci-fi

King's Bounty: The Legend
Shared: RPG · Turn-Based Strategy · Strategy

ENDLESS Space™ 2
Shared: Space · Strategy · Turn-Based Strategy

For The King II
Shared: RPG · Turn-Based Strategy · Strategy

The Last Spell
Shared: RPG · Turn-Based Strategy · Strategy

STAR WARS Zero Company™
Shared: Turn-Based Strategy · Strategy · Sci-fi

ENDLESS Space™ - Definitive Edition
Shared: Space · Strategy · Turn-Based Strategy

Subverse
Shared: RPG · Space · Strategy

Quasimorph
Shared: RPG · Turn-Based Strategy · Strategy

Space Rangers HD: A War Apart
Shared: RPG · Space · Strategy