For demolition:
1. Team gets a huge fort (green), and the other team (blue) gets a huge bomb.
2. Blue has 20 minutes to grab the bomb and drag it (yes, drag.) into the green base, then detonate it inside a designated room, killing every player, blue and green, in a large proximity and ending the match.
3. Mechanics:
When a blue player gets close to the bomb, he can press Q to activate a 'dead mans trigger' on the bomb and start hauling it. While hauling, he moved at 10% of his base speed. However, a buddy can haul with him for +15% movement speed for them both. If all blue players let go of the bomb or die, the bomb will blow up 5 seconds later with a blast radius 3 times that of a grenade. The bomb doesn't destroy blocks except for the green base upon winning the match.
If the green team can keep the bombrunners away from the base for 20 minutes, they win.
For Assassination:
1. One team (blue) spawns in a secret underground bunker, and the other team (green) spawns in a HUGE fort with one of their players randomly selected to be the general.
2. Blue has 20 minutes to sneak into the fort stealthily and kill the general.
3. Mechanics:
Blue can only use the carbine, because of the perceived need for stealth. Green can use any weapon.
The general has 300 health and regenerates 3 HP/second, making killing him a combined effort.
Once a green player sights a blue, the blues position is revealed on the map to all green players until the viewing player either is killed or loses vision.