Roblox Tower Defense
Stop waves of enemies from destroying your core with up to three other friends. Features 3 enemy types, weapon and turret upgrades, and a dynamic difficulty setting.
Anti-Gravity Rocket War
Shoot as many objects with the anti-gravity gun as you can, then use the grappling hook to jump from brick to brick, while shooting rockets at other players. Press "E" to fire the grappling hook. Press the Left Mouse Button to fire a rocket.
The Zombies have stolen your cake, so go recover it! This game is actually pretty bad, so I don't recommend playing it.
City Brawl 4
One of my favorite series that I created, this was the final installment to the series. I realize now how poorly these maps were made, with all the obtainable guns completely overpowered, and the spawn points being very poorly placed. Still, it's a great game for a couple of lulz with your friends. (Game was last modified March 31st, 2008).
Co-Op Zombie Mission
This was an old game I had. It's not really hard, you just have to work together to survive. Use one person to grab the spawn point and drag it along with you, and have other people defend you.