The Metal slug games dont seem to have any forums. Am I rgiht or are I jsut looking at the wrong places.
Reason being I wanted to ask if they have multiplayer so that I can play with my steam friend in Singapore.

All the SNK games seem to share a single forum: https://www.gog.com/forum/snk
I can't say firsthand, but according to the release post, all the Metal Slugs "come sporting GOG Galaxy support complete with leaderboards, and -with the exception of METAL SLUG 2- both local and online multiplayer functionalities." (Which means both of you would probably need the GOG version(s) + Galaxy installed to play together.)
Metal Slug 2's store page doesn't mention multiplayer at all, so probably no dice with that one, unless there's maybe offline local MP that they forgot to mention.

Thanks for info man.

*cough* Would be nice if the game pages here linked to their support forums.

Or am I missing such a link?

Get Barefoot Essentials and they will show up :)

Thank you for the response. Installing such an addon really isn't an option for me.

One of my many "hats" is that I work with companies and websites on their interfaces, usually with the handicap enduser in mind. Making someone install an addon, even if they weren't handicapped, to find a simple link for support on their purchases, a link that probably should be provided in the first place, isn't the best method to solve such a problem. Making things easier, not harder via an extra requirement, is usually the way to go.

But thank you for taking the time to respond. :)

Of course it isn't the best solution, but -as end users- it's the only way we have when GOG doesn't behave the way we'd prefer.

Barefoot Essentials and Adalia Fundamentals are entirely user-created projects, not in any way sponsored, supported or advertised by GOG.

This isn't GOG asking people to install something for extra functionality, but users building tools to provide functionality that the site lack. Because, like you, they are not satisfied with how the site works.