Hello people.
I read some time ago about a ms-dos game that had 4 player multiplayer with null serial cable conection, like in this picture:

The 2 middle computers act as passthrough, having both serial com ports ocupied, so ps/2 ports were needed for mouse.
And the game would need 16 mb ram for this multiplayer, but 8 mb for single player.
I though for a long time it was about warcraft 2.
But, now that I aquired some 486 with ps/2 ports, and wanted to try this, I cant find this information anymore.
Warcaft 2 claims in the manual that has only 2 players in null cable direct conection.
So my question is this: Does anyone knows about such game?
Did I read it on some false game advertising, or was that on some early revision, like youtuber Tech Tangets discovered about doom v 1.1 having multimonitor gameplay?
Or (a very strong posibility), was I drunk back then (I play sometimes in that state of mind) and I missread and scrambled the translation from warcraft 2 manual? (english is not my native language)