Heart of the Frontier is a Wild West themed online slot game developed by Playtech. It features 5 reels and 20 paylines with a minimum bet of 20p and a maximum bet of £2,000 per spin. The game can be played on desktop, mobile and tablet devices.

The game is set in a classic Western town that reminds players of John Wayne movies. Symbols on the reels include regular playing cards (A, K, Q, J, 10 and 9), Sheriff badges, horseshoes, and three lovely ladies who appear in three-symbol high stacks on the reels.

The Heart of the Frontier logo is the wild symbol and can substitute for all symbols except the bandit and sheriff wilds. It also awards players with 500 times their line stake for 5 of a kind on a payline.

The game benefits from Expanding Wilds. There are three wild symbols in the game including the Heart of the Frontier logo and two ladies, where one is a bandit and one is a sheriff. These wilds expand to fill the entire reel when they land on the reels.

The Sheriff wild symbols lock in place once they have expanded and move one reel to the right at the beginning of every spin. When it reaches reel 5, it disappears from the reel set. The Bandit wild symbols also lock in place once they have expanded and move one reel to the left at the start of every spin. When it moves from reel 1, it vanishes from the reel set.

Players can trigger the Showdown Free Games feature by landing the bandit and sheriff wild symbols on the reels simultaneously. This awards them with 5 free spins where all bandit and sheriff wild symbols lock in place for the duration of the feature. Any sheriff and bandit wilds landing during the feature also lock in place for all remaining free spins.

Once the free spins have played out, the Showdown starts, and any sheriffs and bandits on the reels start a shootout. The survivor remains on the reels until the base game resumes. During the feature, players will see a win ticker which displays the full prize they won during the free spins.

Heart of the Frontier is a medium variance slot game which means players can expect to win both smaller and larger amounts. The expanding locked wild stacks can lead to big wins with wins of over 800 times the stake during the base game. However, triggering the Showdown Free Games feature can be quite challenging.

Overall, Heart of the Frontier is an exciting Western-themed slot game with features such as Expanding Wilds and the Showdown Free Games feature, making it an enjoyable game for any slot enthusiast.