Games like Stellaris: Aquatics Species Pack
Games like Stellaris: Aquatics Species Pack include Stellaris, STAR WARS™ Empire at War - Gold Pack, Distant Worlds 2, Sid Meier's Civilization®: Beyond Earth™, and Europa Universalis IV. We matched them by the tags players give Stellaris: Aquatics Species Pack on Steam (Strategy, Simulation, Space, 4X, and Sci-fi): closest matches first, and among equally close ones the better-known games.

Stellaris
Shared: Strategy · Space · 4X

STAR WARS™ Empire at War - Gold Pack
Shared: Strategy · Space · RTS

Distant Worlds 2
Shared: Strategy · Simulation · 4X

Sid Meier's Civilization®: Beyond Earth™
Shared: Strategy · Space · Sci-fi

Europa Universalis IV
Shared: Strategy · Simulation · Grand Strategy

FTL: Faster Than Light
Shared: Strategy · Space · Sci-fi

Sins of a Solar Empire®: Rebellion
Shared: Simulation · Strategy · Space

Anno 2205™
Shared: Strategy · Simulation · Sci-fi

Galactic Civilizations IV
Shared: Space · Simulation · Strategy

Dune: Spice Wars
Shared: Strategy · Sci-fi · 4X

X4: Foundations
Shared: Simulation · Space · Strategy

ENDLESS Space™ 2
Shared: Strategy · Space · 4X

Distant Worlds: Universe
Shared: Strategy · Space · 4X

Sins of a Solar Empire II
Shared: Strategy · Space · 4X

Sid Meier’s Civilization® VI
Shared: Strategy · Grand Strategy · 4X

ENDLESS Space™ - Definitive Edition
Shared: Strategy · Space · 4X

Master of Orion
Shared: Strategy · Space · 4X

Hardspace: Shipbreaker
Shared: Space · Simulation · Sci-fi

Homeworld Remastered Collection
Shared: Strategy · Space · Sci-fi

NEBULOUS: Fleet Command
Shared: Strategy · Simulation · Grand Strategy

Hearts of Iron IV
Shared: Strategy · Grand Strategy · Simulation

Crusader Kings III
Shared: Strategy · Simulation · Grand Strategy

Crusader Kings II
Shared: Strategy · Simulation · Grand Strategy

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