is officially free-to-play and can be downloaded legally through the Steam store . Game Overview
Install the game via your Steam client to begin playing immediately.
: While the game receives regular updates (current as of April 2026), the official free version on Steam is always the latest stable build. Thunder Tier One Free Download (v1.2.1)
Developed by KRAFTON, Inc., this top-down tactical shooter puts you in command of an elite special operations team. Formerly a paid title, it transitioned to a free-to-play model in May 2025. : Realistic Tactical Shooter
Click the button to add the title to your permanent library. is officially free-to-play and can be downloaded legally
To ensure the game runs smoothly, your PC should meet the following recommended specs : : Windows 10 64-bit Processor : Intel Core i7 3770K or equivalent Memory : 16 GB RAM Graphics : NVIDIA GeForce GTX 1070 or better Storage : 20 GB available space DirectX : Version 11 How to Download Open the Thunder Tier One Steam page.
: Avoid third-party "free download" sites offering standalone .exe files for specific versions like v1.2.1, as these often contain malware or outdated, unsupported versions. Using the official Steam platform ensures you have the safest and most current version of the game. Thunder Tier One on Steam Developed by KRAFTON, Inc
: A free Modding Tool is also available, allowing players to create custom missions, weapons, and AI behaviors using a modified Unreal Engine 4 Editor. System Requirements (Recommended)