He’s a special agent who’s trying to catch aliens on our planet. Agent 51 is an online slot game created by Kalamba Games with an exciting UFO/alien theme. Visually, you’ll find icons in different colors and a matrix that looks like a board. The background reveals an office where the agent is doing his hard work.

Agent 51 is played on 5 reels and has 20 paylines. There are five different alien fingerprints and four aliens (including one that looks like a weird octopus and another one with horns) that serve as regular symbols in this game. The secret agent himself is the slot’s wild icon. He counts as any of the symbols we’ve mentioned before. All alien-related icons are collected above the reels. On every tenth spin, all the activated icons on the meter will turn into special expanding symbols. They can appear with multipliers too. To activate a round of Free Spins, players must land three or more wild icons anywhere in view. This will provide 8 free spins during which there’s an expanding symbol on every spin.