Old school slot lovers have a treat in store courtesy of LibertySlots.eu and its new Amazing 7s. The popular online casino is celebrating the launch of its latest classically designed title with a nice account bonus.Between now and 30 June players that enter the code FREESEVENS at the cashier will be in line for an instant $5 account boost.So what can players look forward to on Amazing 7s? Well bars, bells and amazing 7s symbols of course, which can lead to prizes of up to 10,000x.As an option slot title, Amazing 7s features Single Credit, Double Credit and Triple Credit buttons as well as a Play Max button rather than spins. Players are able to choose how much they want for a “Single Credit” and are then given the chance to double or triple that bet as and when required.And advice for playing an option slot title? One player had this to say, “You have to be a bit strategic about it. You can’t just bet max every spin. Personally, I’m always switching from small bets when I’m trying to stretch my budget to bigger bets when it just seems like it’s about time for a nice pay out.”The Mediaeval May Money Maker Slots Tournament at Liberty Slots ends this weekend with hundreds of players in line for a share of the $30,000 prize pool. Players don't have long to wait for the next tournament to come along, with $5,000 on offer to the winner in the June contest. Full details will be announced in the near future.