In order for you to play Trigon: Space Story on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 18.04 +
Processor (CPU):
AMD Phenom II X6 1100T / Intel G3220
Memory (RAM):
4 GB RAM
Graphics Card:
AMD HD 7870 / GTX 660 2GB
Storage:
3 GB available space