I tested blob on my own server and like it so far. It has a nice RTS feel to it, and the mode might actually be a challenge and not terrible. It requires meta at the start if you don't want to get curb stomped instantly, though: The game outright tells you "You are infected by the Blob!" at round start. From there, you have a few minutes to run like hell and find the spot for your core. After a while, you get a message saying "You feel like you are about to burst" a few times. Then you're gibbed and replaced with a blob core, but *you* control the "blob overmind" which has no physical representation on your screen except a cursor.
Your core gets a single layer of strong walls and you expand for a bit as expected, and you take it from there. You can place down nodes, which expand on their own, resource blobs, which generate more "power" (Your resources, being an RTS-style), and "shield blob" which is a copy of the stuff that appears around the core. You can create one last structure: Factory blobs. These produce very creatively named "blobs" which are orange-brown floating bastards that can move freely through your blob tiles and attack anything not of a blobby nature.
You have two other, general functions: Expand blob and remove blob. Expand blob places a single tile of blob, useful for getting the most out of your node's expansion. Remove blob does exactly what it says and I honestly have no idea what you could use it for. Your camera movement is limited to within one tile of any blob. The mode will be awful with only a few people on, but I think ~10 could handle it reasonably well.
There's three ways to end the round: The blob grows too large, the game chalks off the rest of that shift as everyone dying a horrible death and the blob consumes the whole station. The crew kills the blob core, the overmind dies, and the crew wins. There's also a "halfwin," where the crew arms the nuke (I think, anyway) and destroys the station. Everybody dies, but the blob is stopped. The AI also separately wins/loses depending on whether or not it could maintain quarantine.