Soulstack Studio is in active development - public sign-ups aren’t open yet.
Attributions

Credit where it is due.

Third-party creative assets used in Soulstack Studio and the games built on it, with the credit each licence requires.

Animated Base Character

The shared skeletal character rig used across Soulstack Studio games, including Sunder.

Animated Base Character by Quaternius [CC-BY] via Poly Pizza

By Quaternius, via Poly Pizza, licensed CC-BY 4.0.