Developer 
Lines Double Up by Games Inc is a 3x3 slot with five selectable win lines and a 96.1% RTP. It is designed as a low-volatility game, with payouts awarded for predefined symbol combinations and three of a kind. If more than one line wins, only the highest win value among the winning lines is paid.
The game includes a gamble feature that can be activated after any win below 250x the bet. This adds an optional risk element after a successful spin, while the core format remains simple and focused on line wins.
A demo version is available for players who want to play for free and practice before playing for real money. The compact reel layout, limited pay lines and straightforward bonus gamble mechanic make Double Up easy to review in a slot game demo.
