Fire grenade
-when thrown on the ground creates a pool of flaming liquid that does moderate damage to players passing through
-when thrown on a wall, like above a doorway, creates a curtain of dripping flames that does minor damage to players passing through
-when thrown directly at a player it will cause them to burst into flames and die after 1.5 seconds
-when thrown at an ignitable surface, like wood, it would burn and disintegrate the surface causing the layout of the map to permanently change
Ice grenade
-when thrown on the ground it would create a pool of liquid nitrogen that would slow players who moved through it but not damage them
-when thrown on a wall, like above a doorway, liquid nitrogen would drip down like a curtain and slow players moving through it without damaging them
-when thrown directly at a player it would immediately freeze him, without damaging him, for 10 seconds. The frozen player can be used as cover. One melee will shatter and kill him.
-when thrown at a freezable substance, like water, the substance would freeze allowing players to walk on it for a short time. Any damage to the ice will cause it to crack and kill anyone standing on it.