Colony Siege similar games & best alternatives

Colony Siege

PC (Microsoft Windows) • 2020

Should you play it?

Colony Siege combines the best of RTS and tower defense, including base building, mazing, and unit physics. Defend Earth's remaining colonies using an arsenal of deadly weapons to torch, slice, throw, and impale swarms of alien invaders.

What works

  • Strong co-op gameplay and synergy
  • Varied towers, traps, and units for strategic depth
  • Good progression and upgrade system
  • Multiple game modes including endless and survival
  • Sci-fi setting with immersive visuals and effects

Things to keep in mind

  • Final mission considered weak and anticlimactic
  • Some balance issues and dominant strategies reduce experimentation
  • Limited story depth and poor voice acting
  • Maps can feel repetitive and large with limited mazing options
  • Soundtrack and audio effects sometimes bland or repetitive

What to play next

Top picks

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Choose your own criteria ->

Last update: 19/09/2026