Life & fun · alternatives · 2026

24 alternatives to Impossible Creatures

The classic gene-splicing RTS is re-released on Steam.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Impossible Creatures launched in 2015; newer entries below may have overtaken it.

1. 1IW
   I wrote my own RTS game engine in C▲1,102

   2021 · github.com · its alternatives →

2. 2OR
   OpenRA – RTS project that recreates Command and Conquer games▲131

   2014 · openra.res0l.net · its alternatives →

3. 3
   Dawn of Steel▲62

   Mechanized RTS warfare and a race for dominance!

   2015 · its alternatives →

4. 4
   SuperMakers▲255

   An indie game built with no code

   2019 · its alternatives →

5. 5
   NeoWars▲58

   3D node-based RTS with great tactical gameplay

   2016 · its alternatives →

6. 6
   Artificial Superintelligence▲106

   Build the world’s first sentient supercomputer

   2017 · its alternatives →

7. 7TA
   Toy – A thin C++ game engine▲180

   2018 · hugoam.github.io · its alternatives →

8. 8CA
   Crown – A flexible game engine written from scratch in C++▲193

   2017 · github.com · its alternatives →

9. 9AO
   An Open Retro RPG Game Maker in Python▲215

   2016 · github.com · its alternatives →

10. 10HA
    HearthSim, an AI and game simulator for Hearthstone Heroes of Warcraft▲115

    2014 · github.com · its alternatives →

11. 11
    StarCraft HTML5▲126

    An HTML5 version of the classic RTS

    2015 · its alternatives →

12. 12GW
    Game where you write Python robots to fight other players▲142

    2013 · robotgame.org · its alternatives →

13. 13
    Red Game Without A Great Name▲60

    Control a mechanical bird messenger in a steampunk world

    2015 · its alternatives →

14. 14
    Mars Colonies▲67

    A free old-school RTS... on Mars

    2015 · its alternatives →

15. 15
    FreeCiv▲68

    Open source empire-building game inspired by Civilization

    2015 · its alternatives →

16. 16
    Sun Dogs▲71

    An open-world text adventure in a transhumanist solar system

    2015 · its alternatives →

17. 17
    Twine▲71

    Make your own narrative-based games

    2014 · its alternatives →

18. 18CI
    clay.io - Steam for HTML5 games▲15

    2012 · clay.io · its alternatives →

19. 19
    Act of Aggression▲63

    Real-time strategy game hailing from the Golden Era of RTS

    2015 · its alternatives →

20. 20
    Rogue Legacy▲92

    An amazing genealogical Roguelike!

    2015 · its alternatives →

21. 21
    The Invisible Dragons▲73

    A text based game with amazing UI

    2016 · its alternatives →

22. 22
    Knytt▲83

    A platform game with atmosphere & infinite cuteness

    2015 · its alternatives →

23. 23
    Jupiter Hell▲54

    A modern turn-based sci-fi roguelike

    2016 · its alternatives →

24. 24
    Robot Nature▲77

    Addictive Game

    2016 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →