In Heart of the Swarm you can gain XP as each race by building units and killing enemy units. XP gain is obviously disabled in the campaign, and obviously enabled in ranked multiplayer matches.
Is XP gain enabled in any of the following?
- unranked multiplayer matches (via matchmaking)
- vs AI matches (via matchmaking)
- melee matches (via custom game)
- arcade matches
For the modes in which it is enabled, do I earn full XP in all of them or are there any that offer reduced XP?