You can play standard melee matches against computer opponents on all official Blizzard maps (included). No ladder, no matchmaking, but full map editor access.
You typically get the ElAmigos release as a set of .part files (e.g., setup.part1.rar through setup.partX.rar ) or a single .iso . starcraft ii the complete collection elamigos
The 9-mission terran stealth campaign, originally sold as DLC. Most "complete" repacks skip this; ElAmigos includes it fully unlocked. You can play standard melee matches against computer