Dead Night Slot by Fazi

The free games here hinge on a single coin flip the game makes for you. When the bonus starts, it picks one of the regular symbols at random and turns it into a SPECIAL WILD SYMBOL for the whole run, so a ghost, a brain or a pair of reaching zombie hands suddenly behaves like a wild every time it lands. Draw a common symbol and the round can carpet the reels with substitutes; draw a rare one and you're mostly riding your luck. You don't get to choose, which is the catch. Three, four or five of the green skull orbs award 7, 10 or 15 spins respectively, and the orb is a scatter, it triggers from anywhere and pays nothing on its own.

Outside the bonus the red demon skull marked W is the symbol that carries the base game. It substitutes everything except that green orb and lands in full columns, so a single drop can paint an entire reel red and feed several of the 40 fixed lines at once. The top regular symbol is worth 25x for five on a line, with the horror icons stepping down from there into modest territory, which fits the high swings you'd expect from a board built around stacked wilds and a free-spins trigger rather than steady line hits.

The setting is a moonlit graveyard, all cold blue light under a full moon, a haunted castle off to one side, candles burning on a fenced grave and a raven perched in the top corner watching the reels. Against that chill the symbols run hot: glowing eyeballs, purple bats, white ghosts, pink brains and a witch-hatted black cat, with the red and green skulls the only loud colours on the board. It's standard spooky Halloween styling done with some care.

There's no buy button, so the orbs are the only way into the spins. Three mystery progressives run above the reels, Gold, Diamond and Platinum, each dropping at a hidden random point with the odds tied to how much you stake. Any win can be sent to a red-or-black gamble that doubles until you miss or hit the 50,000 ceiling.