If you're looking for a completely free and open-source alternative, you might consider playing a game similar to Terraria, such as:
: While the base game is paid, tModLoader is a free standalone application (available on Steam) that allows you to play Terraria with community-made mods. Installation Methods on Linux
The easiest method to install Terraria natively.
To download Terraria for free on Linux, you have a few options, but ensure you're obtaining the game from a legitimate source. Here's how you can do it:
is a game and is not legally available for download for free. However, if you already own the Windows version, you can download the native Linux version at no extra cost. Availability & Cost
Offers a standalone installer requiring no client. Steam Play: Runs the Windows version via Proton if needed. System Requirements for Linux OS: Ubuntu 14.04 LTS or newer distributions. Processor: Dual Core 3.0 GHz minimum. Memory: 4 GB RAM required. Hard Drive: 2.5 GB available space. Video Card: 256MB VRAM with OpenGL 3.0+ support. Step-by-Step Installation via Steam 1. Install Steam on Linux