Very light by modern standards—requires only 900 MB of space and can run on legacy hardware like a Pentium III. 🔮 Battlemage (Roguelike) - Mobile/PC Indie

Available as a "Classic" title on Steam for a small fee.

This recent release by MFG Assets is a rogue-like Metroidvania featuring fast-paced spell and sword combat. This is a paid game (typically $5.99 on Steam ).

Aldarix the Battlemage is a tactical, turn-based dungeon crawler developed by nikodemusp. Battle Mages - Steam Community

Features a procedurally spawning narrative in an endlessly repeating, randomly generated world.