Impossible Creatures Steam Edition

Released Nov 2015

Impossible Creatures is a 3D RTS game that pits the player against an evil villain. Using Earth’s most formidable animals as building blocks, the player must create an army of genetically-altered mutant monsters in a titanic struggle to protect an unsuspecting world.

95% positive · 1,828 reviews

Done

All announced content has been released

High confidence

Done

All announced content has been released

High confidence

Where to buy

Steam Updated 9 Oct 2026 $9.99 Green Man Gaming Steam key Updated 12 Oct 2026 $9.99

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Evaluation

Impossible Creatures Steam Edition is a modernized re-release of a classic 2003 RTS game, launched on Steam on November 11, 2015. The Steam Edition included all previously released content — the Insect Invasion expansion, the Mod SDK, and all patches — bundled into a single complete package at launch. Following release, the developer issued two patches: a bug fix on November 18, 2015, and a final feature patch on March 30, 2016 that added Steam Workshop support. That March 2016 patch is the last recorded developer activity. No further updates, announcements, or content have been communicated since that date, and there is no unreleased DLC or announced future content. The game launched as a finished, self-contained product and has received no post-launch content additions beyond maintenance patches.

Evidence

Steam Edition launched as a complete package including the Insect Invasion expansion, Mod SDK, and all patches — no additional content announced

store metadata · Nov 11, 2015 source content shipped

high

Patch 3 released adding Steam Workshop support and various bug fixes — the last developer communication on record

news post · Mar 30, 2016 source development ending

medium

Media

Details

Developer

Relic Entertainment

Publisher

THQ Nordic

Achievements

—

Platform

Windows

Controller

—

Steam Deck

Unsupported

Players

Single-player · Multiplayer

Strategy RTS Base Building Classic Real-Time War Sci-fi Retro Action Adventure Character Customization

About this game

Set in a fantastic 1930s world, “Impossible Creatures” is a 3-D, real-time strategy game by Relic Entertainment the creators of Homeworld, Dawn of War and Company of Heroes that pits the player against an evil villain in a desperate campaign across a chain of remote and diverse islands. Using Earth’s most formidable animals as building blocks, the player must create an army of genetically-altered mutant monsters in a titanic struggle to protect an unsuspecting world.

Steam Edition Features:

Fully remastered to work with modern systems
Insect Invasion, Mod SDK (C++) and all patches included
Re-implemented multiplayer and NAT traversal for a smooth online experience
Steam Friend invite implemented
Steam cloud support

Key Features:

Thousands of units: “Impossible Creatures” has more than 50 animals that can be combined to create a vast number of mutant creatures, the results of which are limited only by players’ creativity.
Strategies as boundless as your imagination -- By building these creatures into powerful and effective armies, players can define their strategy and how they want to tackle their opponents.
Explore rich 3-D worlds – The highly detailed, fully 3-D dynamic world allows players to battle in four richly detailed environments, each with special flora and fauna.
Compelling single-player campaigns – Players command dozens of creatures, and henchmen in 15 missions across 14 distinct islands.
Unprecedented replayability – “Impossible Creatures” offers boundless creature combinations, armies, and strategies as well as online play and an easy-to-use mission editor that provides limitless play options.
Unique multiplayer options – Up to six “Impossible Creatures” players will be able to wage war in real time. The multiplayer component will streamline base-building, allowing players to build creatures offline and store them for future online battles.
Transferable units – Players can refine their armies in the single-player campaign, and test their strategies with the same armies in a multiplayer game.