Call to Adventure is a deterministic four-hero expedition. The map is six stacked 128×128 slabs: Surface, Old Halls, Caves, Flooded Deep, Lava Hall, and the Vault. Ramps link the floors. One BASIC script drives each hero.

The party starts on the surface with no items and fights down. When the vault is empty they turn around. On the climb, monsters respawn on floors above them every 15 seconds. Every kill drops gold. Deeper floors, and golems, can also drop a usable item. Gold goes into that hero's purse, not a shared pot. Gear fills one of two item slots. A hero banks gold only after reaching the surface. If everyone dies, the run is lost. If time runs out, the match ends wherever they stand.

Each class has four abilities (keys 1–4) and two item slots (Q, E). Click a pile or item on the floor to pick it up. Click an item slot or press Q or E to use it. Right-click a slot or hold Shift and press Q or E to drop it. Clicking an enemy paints it with a red outline. Damage rolls base + 0..spread, then a class power percent. Healing is negative damage and skips that percent.