It's easy to understand the basics of the gameplay, as the winning combos are spelt out in the paytable of the Olympus Unleashed slot.
Below, you'll find more information on the symbols and their payout values in descending order:
Ares: 5x, 1.25x, 0.5x
Armored Ares: 7.5x, 1.9x, 0.75x
Fully Armored Ares: 10x, 2.5x, 1x
Poseidon: 4x, 1x, 0.45x
Armored Poseidon: 6x, 1.5x, 0.7x
Fully Armored Poseidon: 8x, 2x, 0.9x
Athena: 3x, 0.75x, 0.4x
Armored Athena: 4.5x, 1.15x, 0.6x
Fully Armored Athena: 6x, 1.5x, 0.8x
Mace: 1.5x, 0.5x, 0.2x
Dual Axe: 1x, 0.45x, 0.15x
A, K, Q, J: 0.5x, 0.15x, 0.05x (for five, four and three matching icons, respectively).