My SP campaing is bugged and dying is bringing me to 3-4 checkpoints behind current. I'm not interested in play every checkpoint 3-4 times...

There is no possibility to play Multiplayer, since it's incredible broken.

So, where are my 50 euro spent?

Can you be more specific?
What is bugging? graphics ? And what Computer do you have? The single player works great to me. Only have problems with the account.

(i think that have a lot of patches to make before everything works perfect)

yesterday, my LE PRE-ORDER came, because i was busy i di shut on and up my pc 3 or 4times, at last night i played minimum 5hours, at all it works fine. just by login i have to enter my serial code for mp. i didnt try to join a server but it found so 11 server. just the enemies are sometimes stupid, dont know to explain how, something like if i catched them they are sometime first in a NORMAL POSE, like they arent catched, it takes a moment till they have the pose by beeing catched. anyway didnt find other mistakes/bugs/...?
try out update drivers, and also it seems silly, but i have normally a 22" tft and sometimes i use the over 40" tv from my brother. with this tv i cant play NFS most wanted, and since them, crysis and crysis warhead crash after playing few minutes. try out deinstall game, defrag your hardrive, use a cleaning program like CCLEANER, install it again. before deinstall, check about something like deauthoriseing tool (something called like this) from ea. i lost 1time my license for warhead after i formated few times my pc. i dont have more ideas to help u. i am ot a profi:D i must have such problems to check up:D maybe i could find a answer if i had this problem.

ROFL this game makes me sick.