http://www.thesixthaxis.com/2011/08/31/mortal-kombat-arcade-kollection-is-unplayable-online/
Game makes MK9 look competent in comparison. Netherrealms just sucks at online period.If you’re looking to buy the Mortal Kombat Arcade Kollection for its online mode, you might want to reconsider your options. This compilation has what is by far the worst netcode out of any fighting game I’ve ever played. It’s somehow worse than The King of Fighters XII’s notoriously awful netcode.
I don’t even know where to begin. The biggest problem is that the game runs at about half the speed no matter what. I played Mortal Kombat II and Ultimate Mortal Kombat 3 online and the results were exactly the same. You can’t play it like you normally would for that fact alone. Inputs get dropped and it’s nearly impossible to do moves on reaction. There were moments when I tried jumping and kicking and the jump wouldn’t even register.
It’s completely unplayable. You can only host 1-on-1 lobbies, there is no support for spectating, no replays, or anything like that. You can’t even see the name of your opponent during a match. How is any of this even acceptable? It’s not.
Here’s some footage I just recorded of a match I played online. Ignore the fact that I don’t know what I’m doing (I was Sindel), and pay attention to how slow the game is. That’s what it’s like for every match on PSN. Who knows if the XBLA version is any better. I don’t really want to test my luck, and neither should you.
The Mortal Kombat Arcade Kollection is a lazy port that feeds off your nostalgia. If you want a great fighting game with an amazing online mode, get Street Fighter III: 3rd Strike instead. It has 8-player lobbies, a spectator mode, a replay channel, YouTube uploading support, GGPO netcode, and so much more.