看了一下论坛，老外说如何联机（steam)

tonyworld888

KiwiDude 1 小时以前no online?started the game and it's only me who is a player, everyone else is a npc. is this a bug or a internet problem?
otakuwrath 54 分钟以前 You have to connect to the online server. Main title screen>choose character>choose online
Super Saiyan Gohan 53 分钟以前 Did you just start? If so you have to finish the saiyan sage before online is even unlocked.
Thorwann Lorenzo 32 分钟以前 As several others have mentioned, the online portion is unlocked after beating the Saiyan saga#12
Dave 31 分钟以前Nah! You must go further into the story, and you'll get Internet mode!#13Viperwire 28 分钟以前 I am at Piccolo/Goku fight with Raditz, how many more fights before online mode?#14
Timeraider #EarthlingHype 13 分钟以前 引用自 Viperwire：I am at Piccolo/Goku fight with Raditz, how many more fights before online mode?
think you need to storyquest where you defeat nappa and vegeta (not 100% sure though)