Star Guardians Slot by Evoplay

Each spin opens a blast door into a new room inside a space station. The mech-suited character walks in, and alien enemies spawn across the floor - Soldiers that pay up to 10x, Liquidators worth up to 25x, and Chiefs carrying up to 50x. Combat runs automatically, but a gamepad button in the top-left switches to manual first-person controls with WASD movement, primary fire on left click, and splash damage on right click.

Three characters offer different amplifier abilities that last 7 spins each. Butcher doubles all payouts. Skyler opens locked chests without a key. Keliot forces every enemy to drop loot instead of leaving some empty. Amplifiers stack if a second one triggers before the first expires, and switching characters preserves each one's progress separately - but changing bet size resets everything.

Chests appear randomly in rooms. Unlocked chests drop cheap loot (0.1x-3x), regular loot (3x-10x), keys, or amplifiers. Locked chests - opened only with a found key or Skyler's amplifier - guarantee regular or rare loot up to 100x. The bonus game triggers randomly and throws three waves of Larva enemies (10, then 20, then 30) before a Queen boss fight. Larvas drop rockets and money; the rockets feed a cannon used against the Queen's three armored heads. Destroy all three heads for x100 to x5,000. Run out of ammunition first and the bonus round ends early.