Decay of Logos is a third-person action-adventure RPG developed by Amplify Creations. The game emphasizes player exploration with minimal guidance, featuring a challenging combat system that utilizes a variety of weapons and ancient magic. Players control a young adventurer accompanied by a mystical elk, which assists in environmental puzzles and combat. The world of Decay of Logos is a semi-open realm rich with lore and a voice-acted narrative.

The game's combat requires tactical engagement, incorporating parrying, dodging, and stamina management. The elk companion serves as a secondary inventory for weapons, gear, and potions. Players explore diverse environments, from lush woodlands to degraded swamps, uncovering the history of a divided kingdom. The bond with the elk must be strengthened through interaction before it can be ridden. Non-player characters provide lore and guidance, and the game features automated leveling based on player actions.