Fragger Level 30 is all about timing and accuracy! That's right timing your grenade throws correctly and making sure they drop through the pipes when you do throw them.
Step 1: First loop a grenade through the large white pipe - it's the only pipe you can throw one through at first.
This grenade will then drop next down to the bombs and set off two seperate chain reactions. The second chain reaction will head down, along and up setting off the 4 bombs on the white ledges.
The first chain reaction is more important for you. It will blow a bomb up and this will clear the two thick grey ledges that are blocking access to the second white pipe at the top of the house.
Step 2: As soon as access to the second white pipe is available, loop a grenade through the pipe. It will land on the grey ledge at the top right corner of the house. This grenade won't blow up the grey ledge beneath it, but instead the one below and to the left hand side of it.
Note* This explosion must happen before the second chain reaction of bombs coming from below reaches the top of the house. If this explosion fails to take place before then, then the final ticking bomb will not been thrown through to the right of the house where the second fragger man is standing. It will then be impossible to kill him and you will have failed the level.
Step 3: With the ledge that was blocking access to the final chain reaction bomb cleared, the last bomb will fly through to where the second man is standing and blow him up.
Loop one more grenade through the top white pipe and it will eventually fall through to the bottom right hand corner of the house and blow up the last man! That's level 30 complete!