"Barely Made It" - Survive a Rocket, Tank Shell or Gravity Rocket projectile. (You must be included in the blast radius and be damaged/impulsed, but not die)
"Wave Beam" - Kill somebody using an explosive projectile who is out of sight. (Behind a wall/etc, so you can't see them but the radius kills them)
"Charge Up" - Do not fire for five or more seconds, then kill somebody with a single shot.
"Landscaping" - Build fifteen or more bricks from the "Baseplates" category, in the same stack.
"Teamwork" - With three or more players in a vehicle with a turret, kill somebody. (e.g. Tank or Military Jeep. All players currently in the vehicle get the bonus)
"Flak Cannon" - From the ground, use a spread-fire weapon to destroy a flying vehicle. (e.g. Shotgun or Minigun on a Stunt Plane)
"Merciless" - Kill somebody who has been disarmed. (via the clearTools event or dropping tools, so they have none left)
"Speedy Thing Comes Out" - Kill somebody using a teleported projectile or vehicle. (Portal Gun
)
"Medic" - Heal three people in one life during a minigame while making no kills. (The Pill or zombies mod with the Medikit/saving from Downed)
"Bad Karma" - Chain-kill three or more people with the same weapon and then be killed with the same one.
While such a mod could be hacked, it would be fun to try and find out/unlock each one yourself.
