The 300 Shields Mighty Ways slot game takes place in a golden wheat field and features higher-definition graphics and more information to take in. Following a well-travelled route, one enters a valley dotted with ancient buildings during what appears to be a dry Peloponnesian summer. However, during free spins, rain falls from the sky over a stormy background, likely depicting the historical Thermopylae battle between the Persians and Spartans.
Bet lines are eliminated in favour of a win-all-ways method when the Mighty Pays mechanism is used. There are 729 possible winning combinations in the standard 6-reel, 3-row layout.
Whatever the size of the grid, in order for winning combinations of three or more symbols to land on adjacent reels, they must begin on the leftmost side of the grid. The lower-value side of the table features royals with arrows sprinkled on them, paying 0.5x to 0.9x the wager for six of a type. The higher-paying side features arrows, swords, ships, helmets, and archers, offering 1.5x to 10 times the stake for a six-symbol win. The warrior wild is the game-changer; it can replace any regular paying symbol when it appears on any reel except the last one on the left.
Every spin uses the Mighty Ways mechanic, which gives you 729 potential ways to win. To win, you need to line up three to six matching symbols from extreme left to right on neighbouring reels. On reels 2–6, premium weapon symbols payout 1.5 to 10 times your wager for 6 of a type, while warrior Wild symbols can show up to replace pay symbols and aid finish wins.
When you win, the winning symbols disappear from the grid and two additional positions are added to the appropriate reels. Subsequently, new and/or existing symbols descend down to fill all vacant slots. If you keep winning, the process will continue, and each reel can extend to a maximum of 8 spots. Everything resets between spins in the regular game and the bonus round, giving you 262,144 possibilities to win.
In order to enter the Bonus Round, you must have 3, 4, or 5 shield scatters visible. This will reward 5, 7, or 10 free spins, accordingly. You unlock the Super Free Spins variant when you get 6 scatters. Warrior wild wins during the feature are multiplied by 2. Scatters award extra spins and can be used to improve the wild multiplier.