Well, there’s something that you could start another thread on. Could certainly make water more interesting; add reefs, underwater cities, flooded homes, hostile fish, occasional underwater mines, sunken ships… But that would definitely be for another thread.
I came here to post an idea I brought up in IRC, and would add in myself if mutations were more modular: Horse mutation category.
Functionally like a cross between cattle and bird.
Would have grazer, hooves, mammal pheromones, a few reflavors of some cattle mutations (such as tail), road-runner, a few strength ups, deformed, and maybe an upgrade to hooves for more horse-kicking action, in addition to other miscellany (likely taken from cattle and/or beast).
So by crossing a runner and a tank, we ought to come out with a moderate level of health, decent defense, middling-high speed, low maintenance category; ideal for a nomad: durable, but not costly (like Rat); mobile and self-reliant, but not fragile (like Bird); with offensive potential, but still a higher level of vulnerability than a tank (like Cattle).
Nothing revolutionary, but maybe worth a thought.[/quote]
Crossing this with moose mutations might be an idea.
Loner: You get penalties for being around sentient allies (mostly humans) > Rivalry: Being near same sex, similar species allies angers you. You suffer (bigger) moral penalties until you smash them, but you gain moral and stat boosts for doing so > Aggressive Impulsion: Similar to rivalry, but for anything that was previously, or naturally an ally.
Road Runner > Long Stride: You cover ground more quickly but your long stride interferes when moving over rough terrain > Gallop: You frequently jump around, increasing your movement speed (while decreasing penalties) and jumping over things costs nothing extra (parkour expert). You can jump over enemies and have a chance of kicking them when moving near them.
Hooves > Kicker: Your legs are very strong and well suited for kicking > Reactive Kicker: You occasionally lash out at enemies with a kick, sometimes kicking those that are behind you or to the side. On dodge you get an extra chance to kick. Moose can apparently kick in any direction, according to several sources, and are more dangerous to approach. I would love to see that in action…
Antlers: You have a small set of antlers and occasionally like to impale enemies, but bits of flesh and cloth get stuck in them when doing so > Large Antlers: Your antlers have grown several feet long and offer moderate protection as well as sharper spikes. You can harvest them and they will grow back, however this is painful since they have more nerves then normal.
I think a moose category fits CDDA a bit better, since moose are already in the game and the mutagen could be made from antlers even. There are some mutations that suite the Cataclysm moose quite well… I think everyone has had that moment when they step to close to one and realize moose are jerks! Beware of moose mutant npcs.