When it comes to Norse mythology themes, Yggdrasil is an expert, and Towering Pays Valhalla is no exception. As the reels are set in some Viking buildings, we don't see much in the background, but the graphics are just pleasing to the eye. The soundtrack adds a final touch to the ambiance when a piece of epic orchestral music blares out of your speakers. Apart from the originality of the theme, there's nothing to complain about.

Towering Pays Valhalla features five reels that expand to five by eight during bonus features. There are 15 paylines by default, but the number can be increased to 65 on larger grids. Towering Pays Valhalla is powered by a highly volatile math model that has a RTP of 95.75%, which is slightly lower than average (increases to 96.55% with the Buy Bonus). The game accepts wagers between £0.25 and £31.25 per spin. Players can expect payouts of up to 10,000x their bet on a single spin here, and the potential is quite decent.

Towering Pays Valhalla includes 10 regular symbols that fall into two categories. In the lower part of the card, you'll find classic card suits, such as hearts, spades, clubs, and diamonds, shaped like runestones. Following them are six premiums, which include dragons, eagles, horses, bulls, foxes, and Vikings in ascending order. It is necessary to match at least three symbols adjacently starting from the leftmost reel to score a win. A 5-of-a-kind premium win is worth 1x to 6x the stake. Wild symbols are Horns of Odin, which substitute for all other symbols and pay up to 10x the line win.

Mega Tower Magic allows Tower symbols to land on reels 1-3, 1-4, or 1-5 depending on the game's stage. As Mystery symbols, towers appear stacked on the reels and reveal the same randomly chosen symbol (including the Wild) whenever they appear.

When you land at least one Tower symbol on a reel where they're active, you advance to the next stage, or more specifically, you add an additional row and 10 extra ways to play. You will not see the grid reset until you reach Free Spins, although each bet option will progress at its own pace.

Towering Pays Valhalla's most common win is a Free Spins bonus, which triggers in a different way than other slot games. During the final stage of the Feature Trail, players are offered Free Spins if one Tower symbol appears on each of reels 1, 2, and 3 during a 5x8 grid. A player can then accept or reject the feature to move on to a better one.

Each Free Spins option awards 7 spins to start and begins at a standard 5x3 grid. In sequential order there are the following features:

-Valkyrie Free Spins - Multipliers may occur on wins.

-Loki Free Spins - Multipliers are guaranteed on any win.

-Thor Free Spins - Multipliers are guaranteed on any win. Towers also appear on reel 4.

-Odin Free Spins - Multipliers are guaranteed on any win. Towers also appear on reel 4, and on reel 5 in the 5x8 grid.

In all Free Spins features, players can get extra spins if they land at least one Tower symbol on each reel.

Also included is a Buy Bonus feature, which allows players to access Free Spins immediately for the cost of 60x, 80x, 100x, 120x, or 140x the stake. The Bonus Wheel consists of 16 segments with different bonus features that players can choose from. There are 10 Valkyrie, 3 Loki, 1 Thor, and 2 Odin segments on a wheel for 60x cost, but you can adjust the wheel by paying more. On the highest price Bonus Wheel, there would only be one Thor segment, and the rest would be Odin segments. During Free Spins obtained through the Bonus Buy feature, the payback percentage increases to 96.55%.

Towering Pays Valhalla is by far the most appealing game in the Towering Pays collection, both from a design and gameplay perspective, following the partnership with Yggdrasil. Additionally, the math model has benefited a lot, making the slot easier to play and offering players much better prizes. With a good combination of exciting features and a flawless design, Towering Pays Valhalla is likely to reach the top of players' favorites, at least in the Norse-themed niche.