Shroom Siege, the team-based arcade action platformer from developer Upside Down Bird, spreads onto Nintendo Switch, PlayStation 4|5, Xbox Series X|S, and PC via Steam in 2025, with a new Steam demo coming Tuesday, August 6.
The fungus kingdom spreads its tendrils and controls surrounding insectoids to claim dominance. Start as a mini mushroom with the power to infect and sway the minds of mightier life forms. Show off superior shroom strategy in 4v4 multiplayer madness.
Strive for victory in three ways: Shrine, Shogun, and… Poop?! Master multiple mounts to outwit opposing fungi, such as the merciless Mantis, equipped with razor-sharp claws to cut down the competition.
Win three Victories to emerge triumphant
Shrine Victory. Command Minions to collect enough small orbs to offer as sufficient tribute to surrounding shrines. Watch for danger and move quickly! Minions respawn indefinitely, so going for the Shrine means playing it safe.
Shogun Victory. Eliminate the opposing Shogun three times. Control the mighty flying Shogun and cut down any adversary lower than them with its samurai sword. High-risk, high-reward: fatal missteps bring the other team closer to their own Shogun Victory!
Poop Victory. Force foes to smell the stench of defeat by mounting a Dung Beetle to slooowly roll a poopy payload to the opposite side of the map. Winners often report this as the most satisfying way to win. Losers often claim it’s the most humiliating.
Strategic Visibility: Mastering the Single-Screen Map in Shroom Siege
Each single-screen map makes all characters and strategies visible at all times. Beyond quick reflexes and witty tactics, Shroom Siege also encourages communication and coordination. Gather friends locally or play online, forming two teams of four with cross-platform functionality. Join matchmaking alone or with a squad and test those shroom skills around the world.
“The original version of Shroom Siege was created during the 2023 Global Game Jam. Like a mushroom, the project kept growing, and we hope others will enjoy our wacky, fast-paced multiplayer game.” – Ben Hamrick, Developer at Upside Down Bird.
Shroom Siege will be available on Nintendo Switch, PlayStation 4|5, Xbox Series X|S, and PC via Steam in 2025, with the Steam demo launching on Tuesday, August 6. The demo will feature English text, with plans for additional language support.
