I had good experiences with coop with 5 people and a rental server from serverblend . This was 3 months ago . I was admin , and it took a lot of work on my end to keep everything running , but we had a great time until we had nailed down survival . At that point we got bored due to game limits . The server could not handle large ships well , so we ended up limiting ship size to max 4000 blocks ea IIRC , and max 10 K blocks per player total . This helped , but several players were frusterated due to having to abandon ships in mid construction . I was frusterated , because I was building a lovely little pocket carrier , but with 8 fighters docked it was over 12 K blocks , and the slowdown was unreal if I tried to move it . Ok , so we grimly stuck with it . Built and rebuilt , but were still bored . Decided to add enemies . But again , the server just couldn ' t handle it well . Combat would slow everything down to a lag fest for everyone , so we might as well all be in combat , because X couldn ' t mine or even walk effectively in some cases if Y and Z were off fighting a pirate . Tried adding planets , similar problems . This could be due to at least one player having a weaker machine , but vanilla planets did not add much we got bored of shooting bugs in about 5 minutes while reducing sim speed for everyone . Modded server friendly planets helped some , but again failed to add anything to do . TLDR had stable space coop survival 5 p fun on a rental server that I admined 3 months ago , but quickly ran out of things to do . Planets and combat were not stable enough at that point , and larger builds ruined our experience .