Forts
Forts is a 2D physics strategy game where you and co-op friends build a fort in real time, bolt on guns from machine guns to plasma, and try to drop…
92% of 21,390 Steam reviews are positivePlayers online now: 489$8.99
Co-op games like CastleStorm
If CastleStorm left you wanting something chaotic and funny, you have options. These co-op games keep things close enough to feel familiar. Plenty here let you team up if you like.
King Arthur's Gold
King Arthur's Gold is a fast 2D medieval team game where builders raise castles, knights swing swords and archers grapple across walls. You tunnel under forts, burn and flood enemies, crew siege machines and collapse towers with physics. Great with co-op friends who like building, breaking things and switching sides between teamwork and rivalry.
Chaotic, Funny, Colorful
84% of 5,237 Steam reviews are positivePlayers online now: 13FreeCastle Story
Command a crew of little yellow Bricktrons, stack a castle brick by brick on a floating island, then hold it with catapults, traps and explosive barrels. Best with co-op friends: one crew digs and hauls while the other builds, then everyone grabs a weapon when the Corruptrons come.
Chaotic, Colorful, Competitive
67% of 9,312 Steam reviews are positivePlayers online now: 56$9.99Forts
Forts is a 2D physics strategy game where you and co-op friends build a fort in real time, bolt on guns from machine guns to plasma, and try to drop the other fort first. Matches hold up to eight players, and collapsing physics does the punchline work for you.
Chaotic, Funny, Fast-paced
92% of 21,390 Steam reviews are positivePlayers online now: 489$8.99Tower Wars
Tower Wars turns tower defense into a two-way fight: you build maze-like defenses while sending your own units at the other side. Matches run 1v1, 2v2, or 3v3, plus co-op against bots, all in a cheerful steampunk style. Bring co-op friends and expect a proper race of economy, towers, and timing.
Fast-paced, Competitive, Replayable
71% of 1,203 Steam reviews are positive$7.99Stronghold Crusader 2
Build a desert castle with co-op friends, then knock someone else's down. Stronghold Crusader 2 pairs castle building and fast-paced RTS battles, and co-op mode lets you share the building, troops, and resources while AI lords and rival teams come for your walls.
Chaotic, Competitive, Replayable
73% of 12,695 Steam reviews are positivePlayers online now: 193$39.99Besiege
Besiege is a physics building game about medieval machines that smash armies and castles. With co-op friends you bring those rickety catapults, saws and flying contraptions into multiplayer, team up to clear objectives and puzzles or turn on each other in machine combat.
Chaotic, Funny, Competitive
95% of 48,215 Steam reviews are positivePlayers online now: 179$14.99Castle Crashers®
Four knights, one stolen crystal, and a string of kidnapped princesses. Castle Crashers is a cartoony 2D beat-em-up best played with up to four co-op friends, hacking through a silly medieval road trip while leveling stats, grabbing weapons, and squabbling over loot.
Also in Party · Chaotic, Funny, Colorful
96% of 110,339 Steam reviews are positivePlayers online now: 708$14.99Castles
Castles tells the story of the ambitious King Harold, whose greatest achievement will be the tower you are constructing. As the tower grows taller and taller, more and more challenges arise along with it.
Chaotic, Funny, Colorful
59% of 39 Steam reviews are positive$0.99Stronghold Legends: Steam Edition
A castle sim gone full legend, with King Arthur, Siegfried and Dracula each leading castles, armies and monsters. Build walls, run food and resources, then settle it online with up to four players in Deathmatch, King of the Hill, Economic War and Capture the Flag. Best with co-op friends who like slow building that ends in sieges.
Colorful, Competitive, Replayable
87% of 2,337 Steam reviews are positivePlayers online now: 95$14.99Extremely Realistic Siege Warfare Simulator
Extremely Realistic Siege Warfare Simulator is a physics-based tactical strategy game where you must lead a military force in a fantasy medieval world. Build an army. Construct siege equipment. Experience epic battles. Lead your people to victory!!
Chaotic, Competitive, Replayable
54% of 384 Steam reviews are positiveFreeCitywars Tower Defense
A third-person tower defense where you and co-op friends guard a core Crystal together. Split the jobs, raise towers, gather and craft between waves, then fight beside your walls when monsters break through.
Colorful, Fast-paced, Competitive
79% of 1,127 Steam reviews are positivePlayers online now: 4FreeRock of Ages
Two castles, two giant boulders, one bad neighbor. Roll downhill to smash their gate while they roll to smash yours, laying traps and towers in between. With co-op friends it turns into shouting, laughing, and very fast revenge.
Also in Party · Chaotic, Funny, Colorful
92% of 3,392 Steam reviews are positivePlayers online now: 7$9.99
Cheaper than CastleStorm
Tower Wars
Tower Wars turns tower defense into a two-way fight: you build maze-like defenses while sending your own units at the other side.
71% of 1,203 Steam reviews are positive$7.99
Castles
Castles tells the story of the ambitious King Harold, whose greatest achievement will be the tower you are constructing.
59% of 39 Steam reviews are positive$0.99
Castle Destroyers
Gather resources, build, power up and battle. Choose between two different teams in Castle Destroyers, build your castle with your teammates and…
0% of 2 Steam reviews are positive$0.99
Castle Chaos
Castle Chaos is a fast paced multiplayer game for up to 4 players inspired by the old classic game "Rampart".
51% of 39 Steam reviews are positive$2.99
Hyper Knights
Slash and Dash, raise your army, learn powerful combos and take back your land!
88% of 711 Steam reviews are positive$4.99
Graphic Tower Defense
This is a minimalist-style tower defense game that is easy-going and relaxing, with a moderate level of difficulty.
85% of 61 Steam reviews are positive$3.99
Terrorhedron Tower Defense
Terrorhedron is a 3D co-op tower defense where you and up to seven co-op friends hold back waves of bright bouncing spheres on floating grid maps.
84% of 1,007 Steam reviews are positive$1.99
Castle Combat
RTS, but the soldiers will act automatically: Each soldier has different characteristics/attribute values/action methods.
75% of 4 Steam reviews are positive$2.99
Orcs Must Die! 2
You and one partner pick the War Mage or the Sorceress, lay traps and guardians around a fortress, then meet the horde head-on with weapons and…
92% of 12,943 Steam reviews are positivePlayers online now: 79$3.74
Splatapult
Aim. Charge. Launch livestock. Watch castles crumble in glorious physics chaos. Knock archers off towers, defeat grand wizards, "rescue" the princess.
100% of 1 Steam reviews are positive$2.99
Arrival of Beasts
Discover one of the hardest tower defense games with strategic elements, individual gameplay and challenging mechanics.
94% of 32 Steam reviews are positive$8.99
Hidden gems like CastleStorm
Toy Tactics
Become a master strategist in this physics-based Real-Time Tactics game!
91% of 121 Steam reviews are positive$24.99
TDS - Tower Defense Strategy
TOWER ▪ DEFENSE ▪ STRATEGY. Control Vessels. Utilize their uniquely deep set of towers. Create an everchanging defense. Play with friends.
81% of 322 Steam reviews are positivePlayers online now: 4$17.99
Block Fortress 2
Choose a planet, build your fortress, and prepare for war. Arm yourself with powerful weapons, deploy troops, construct turrets, and defend your…
82% of 270 Steam reviews are positivePlayers online now: 3$19.99
Warlords Under Siege
Warlords Under Siege is a mix of RTS and Roguelike genre, where you build a small city and defend it against continuous waves of enemies.
76% of 441 Steam reviews are positive$9.99
Vectorio Classic
Vectorio Classic is a simple 2D survival base-builder where you and co-op friends claim resource patches, research better weapons, and hold the line…
93% of 1,474 Steam reviews are positiveFree
EverSiege: Untold Ages
A hero-driven strategy roguelite where you and up to two co-op friends defend Bastion, fuse weapons with elemental essences, and send troops at the…
68% of 1,962 Steam reviews are positivePlayers online now: 31$19.99
Citywars Tower Defense
A third-person tower defense where you and co-op friends guard a core Crystal together.
79% of 1,127 Steam reviews are positivePlayers online now: 4Free
Colony Siege
Colony Siege combines the best of RTS and tower defense, including base building, mazing, and unit physics.
91% of 199 Steam reviews are positive$19.99
Royal Revolt II
Royal Revolt II is a medieval reverse tower defense where you lead raids on castles built by other rulers, then rebuild your own to survive theirs.
77% of 432 Steam reviews are positivePlayers online now: 54Free
Hyper Knights
Slash and Dash, raise your army, learn powerful combos and take back your land!
88% of 711 Steam reviews are positive$4.99
Rock of Ages 2: Bigger & Boulder™
Roll a giant boulder through art history while your co-op friends do the same beside you.
90% of 2,837 Steam reviews are positivePlayers online now: 16$14.99
They Can't Stop All Of Us
Storm Area 51 as a co-op tower defense shooter. You and co-op friends hold the base with guns and traps, then flip sides and send waves of meme…
73% of 1,625 Steam reviews are positiveFree
Newest co-op games like CastleStorm
Hack 'n' Stack
Physics meets tower defense in this chaotic party game up to 4 players. Craft barricades and turrets with whatever you can find.
100% of 5 Steam reviews are positive$19.99
EverSiege: Untold Ages
A hero-driven strategy roguelite where you and up to two co-op friends defend Bastion, fuse weapons with elemental essences, and send troops at the…
68% of 1,962 Steam reviews are positivePlayers online now: 31$19.99
Territory Control 2
A 2D multiplayer sandbox game revolving around industry, innovation, factions, combat and emergent gameplay.
76% of 91 Steam reviews are positive$19.99
Graphic Tower Defense
This is a minimalist-style tower defense game that is easy-going and relaxing, with a moderate level of difficulty.
85% of 61 Steam reviews are positive$3.99
TDS - Tower Defense Strategy
TOWER ▪ DEFENSE ▪ STRATEGY. Control Vessels. Utilize their uniquely deep set of towers. Create an everchanging defense. Play with friends.
81% of 322 Steam reviews are positivePlayers online now: 4$17.99
Block Fortress 2
Choose a planet, build your fortress, and prepare for war. Arm yourself with powerful weapons, deploy troops, construct turrets, and defend your…
82% of 270 Steam reviews are positivePlayers online now: 3$19.99
Eyes of War
Eyes of War is a real-time strategy game set in the medieval era, offering both single-player and multiplayer experiences where you can control…
76% of 274 Steam reviews are positive$14.99
Warlords Under Siege
Warlords Under Siege is a mix of RTS and Roguelike genre, where you build a small city and defend it against continuous waves of enemies.
76% of 441 Steam reviews are positive$9.99
Axon TD: Uprising - Tower Defense
Axon TD lets you and your co-op friends redraw the battlefield itself, laying tiles to stretch enemy routes and bridge to new islands.
85% of 710 Steam reviews are positivePlayers online now: 18$19.99
Toy Tactics
Become a master strategist in this physics-based Real-Time Tactics game!
91% of 121 Steam reviews are positive$24.99
Bish Bash Bots
Bish Bash Bots is a unique mix of casual tower defense strategy and all-out brawling action.
76% of 145 Steam reviews are positive$19.99
Bunker Defense
Bunker Defense is a tower defense game for 1-4 players. Waves of enemies attack your base, and you must defend it by building different kinds of…
84% of 43 Steam reviews are positive$24.99