Just some random ideas for Blockland.
#1 Checker Style Playertype
A playertype where you can move the ammount of a 4x4 plate, and can't move again until recharged
#2 Scopes
How bout a sniper that when you zoom you can have like a scope thing.
#3 Backfire
A gun where when you right click, you shoot backwards
#4 Mortydom (spelling)
When you die you drop an HE-Grenade. Like in CoDW@W
#5 Halo-ish Fusion coil
When you touch it, it will roll over, and if you shoot it ... Bewm?
#6 Homing Missle
It locks on to any vehichle in range.
#6 Tf2-ish Stealth
When you right click you turn stealth like in tf2 (some has made a topic about halo-ish cloaking, thats what i mean but right clicking) and when the bar runs out you turn re-visible.
#7 A new flamethrower
When the player is hit by a flame they set the fire a emitter
#8 Land Mine
You stick it into the ground. When someone steps on it, it explodes.