Speedrun but for every level you beat, you have to beat it in the other port after you beat the other, for example you are in the first level of sarge's heroes in the PS1, you speedrun normally then switch to the PC port and then the N64 port, GBC games dont count since most of them have different missions and is hard to tell.

It cant be all in a single run because it will take a lot, and as an extra challenge portal Runner ps2 and gbc without restarting the game

Army Men 1 Speedrun, then army men 3d and gbc speedrun army men 2 speedrun and gbc army men 2, army men world war pc, ps1 and operation green, then SH1 ps1, N64, then gbc, then air combat ps1 N64 and gbc. All in that especific order and killing only the necesary enemies (for gbc games is more likely necessary to kill them all) And a little thing more, you have to make it continued, for example, if you are going to speedrun army men 1 you must continue with 3d and the gbc port in the same run, you can rest and let army men 2 for another run.