Steam Playtests
Monuments to Ruin

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Monuments to Ruin playtest

by OHNSINN

Build defences, explore an all-encompassing fog and pray you can fight off the massive hordes of Ruin. Engage with an expansive unlock system and survive in a world that changes with your decisions. ‘Monuments to Ruin’ is a roguelite, tower defense game set in a world ravaged by a suffocating fog.

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Anyone with a Steam account can join, and it's free.

Access
Instant
On playtest since
Aug 7, 2026
Planned release
To be announced
Developer
OHNSINN
Platforms
Windows
Players
Single-player
Languages
English, French, German, Japanese and 5 more

How to join the Monuments to Ruin playtest

  1. Open the game's Steam page with the Join playtest button. Sign in to Steam if it asks.
  2. Use the Monuments to Ruin playtest signup there. You're in straight away, with nothing to pay.
  3. The playtest shows up in your Steam library, ready to install and play.

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About Monuments to Ruin

‘Monuments to Ruin’ is a roguelite, tower defense game with gridless building placement and a fog covered world to explore. Unlock endless buildings and upgrades and try countless different synergies and strategies to overcome the many challenges to reclaim the land from Ruin.

DESIGN DEFENSIVE STRATEGIES

  • Freely place your defences and watch the enemies choose new paths to destroy your Bastion. But beware, breaking through your defences might become the easier option.
  • Construct your defences with unique buildings that can define your strategies and allow many different playstyles.
  • Upgrade your buildings after every night with random rewards to create powerful (and sometimes gamebreaking) synergies.

EXPLORE THE FOG

  • Push back the fog called Ruin. Reclaim and expand the land you can build on. Change the battlefield in your favour.
  • Uncover all that has been lost to humanity in the fog. Relic ruins, repairable towers and abandoned villages could change the tide of battle.

PLAN YOUR ADVANCE

  • Unlock new buildings and upgrades in an expansive unlock tree. Discover, refine and adapt ever expanding build strategy options.
  • Assess the risk of progress in an interactive unlock tree. Foresight might increase your chances of survival. Careless abandon will assure your end.

MASTER A SHIFTING WORLD

  • Fight on procedurally generated maps in varied biomes that bring unique challenges.
  • Contend with fluctuating climate conditions that are influenced by your decisions as much as they impact your strategies.
  • Adapt around random rewards and create a multitude of approaches. No experience will ever be the same.

From the game's Steam page.

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