Alien Flex is a humorous top-down shooter. There is no full-fledged plot in it, but there is a plot connection. The game tells the story of the adventures of an alien who loves to flex. He loves to dance and do drugs. The anti-hero breaks into secure storage facilities and steals prohibited substances from there. On the way to his goal, he engages in firefights with anyone who gets in his way. Enemies are represented by various guards. Sometimes there are bosses among them. Each type of enemy requires a different approach.

Alien Flex has fast-paced and challenging gameplay. The character dies from any hit. In his arsenal there was a place for pistols, machine guns, shotguns, assault rifles, and grenade launchers. There's even a rail gun and an energy shield. Each weapon has its own ultimate. In close combat, you can kill opponents with a cyber blade. The protagonist can do jerks and somersaults. He immediately appears with one of the guns. The rest of the weapons can be found on the map or taken from the adversaries. The video game is divided into levels. There are about 15 of them in total, and they open sequentially. To complete the location, you need to eliminate all enemies and run to the box with narcotic drugs. If you die, you will need to start the entire stage over again. If the outing is successfully completed, the protagonist performs a dance. Moreover, his dance moves are new every time.