cofruben

Hello,

In my opinion, if you have the time to do it in UDP go for it. The problem is that it will require a lot of time and effort from you to achieve what you want instead of just using TCP, unless you have experience in this field or you just want to learn.
1) That is true, UDP has got less overhead and it is faster, but you have to manage it well for your game.
2) To check if the client is still connected, just do the typical ping (ie: send an empty packet to be answered, if any error occurs the client is probably disconnected).
3) For that, you can use sequence numbers. If any packet is lost, you have to ask for it.
4) Well, in a fighting game it can be a big deal. It is not the same just kicking or jumping and kicking, provided that the jumping packet was lost.
5) Normally, clients don't send input to the server. They should be smart enough to suppose that the packet reached the server and therefore the client should start its animation even before the packet arrived.

In my opinion, your requirements can justify using TCP over UDP, as you require all packets to arrive and also to arrive in order.

Count on me for the pre-alpha, you're doing an impressive work.

Aren't you looking for an isometric transformation?