>>339630493
Works for me. 
>>339630565
I think this is the Halo map but it's quite chonky, 2.7gb https://steamcommunity.com/sharedfiles/filedetails/?id=2432298572&searchtext=halo+zombies
Here's MC Oasis https://steamcommunity.com/sharedfiles/filedetails/?id=1931739042&searchtext=minecraft+oasis

Not sure if the first is the right Halo map, the other anon might be able to correct me if I'm wrong. Other map ideas would be good too