Towering Pays Excalibur slot has 5 reels, rows and % RTP. Click here for AboutSlots complete slot review & information on where to play it! Discover Games Lab's groundbreaking Towering Pays Valhalla slot with an average % RTP. Betway US Bonus 50% First Deposit Match up to. . 18+. Bonus € + Free Spins Bonuses Avalible. Play Now. Towering Pays Valhalla is a video slot from Games Lab that has 5 reels Betway NJ.