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This is Decimation's Demo version: Sci-fi tower defense meets ARPG-like hero combat. Build towers then fight alongside them with your hero as you battle through the game's first two levels. Take your first steps to uncover the fate of a colonization effort on a distant planet.
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This is the Official Demo Version of Decimation
Tower defense where YOU are the deciding factor. This isn't passive strategy. You command a hero on the battlefield with ARPG-style combat while managing tower defenses. Perfect tower placement means nothing without playing your hero to the fullest.
ACTIVE HERO COMBAT
Control your hero directly with ARPG-style combat:
4 active hero abilities that charge from defeated enemies or use cooldown timers
Avoid enemy attacks, pick up power-up orbs, and execute precise skill rotations
Your hero's performance determines victory or defeat—towers alone won't save you
ROGUELITE BATTLE EFFECTS
Elite enemies drop power-up orbs that pause combat and present 3 random choices from 15 game-changing battle effects:
Direct damage strikes, speed manipulation, damage amplification, resource boosts and more
Different effects each run keep battles fresh and unpredictable
Strategic timing of these effects can turn losing situations into clutch victories
RPG PROGRESSION
Upgrade your hero and arsenal between battles:
Level up your hero to spend skill points
Craft equipment from battle loot to equip on towers and heroes
Unlock new strategic options as you acquire new equipment modules
TACTICAL TOWER DEFENSE
Place and upgrade towers with distinct roles while fighting alongside them. Resource management, positioning, and timing matter—but your hero skills are what clinch victory.
WHAT'S IN THE DEMO? (Updated Dec 20, 2025)
The demo now contains the first 3 levels of the game's first act and will allow you to experience/test the features in the description above, to a limited extent compared to the game's most current version. It's designed to give you preview of what the game is about and its core gameplay loop.
In terms of playtime, battling through the first two levels will take around 25-30 minutes average (not including exploring the non battle screens). The third level, which was added on Dec 20th, 2025 takes around 25 minutes on average to complete.
CAN I FIND OUT MORE?
Yes, please visit Decimation's Early Access page for more details about the upcoming game. If you liked the demo, please consider adding the game to your wishlist to receive updates about Decimation here on Steam.
