it's a bit confusing, and parts of the story don't fit together exactly, but it's what I came up with since I felt you didn't need an exact design of the game. You just wanted to understand the concept right? I'm bad with this stuff :3
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Title:
Growing Pains
Genre:
Top-Down Fighter with RPG elements
Story:
The government caused a radioactive spill in the area of
your city, which has unnatural tumbleweed growth. The reasons are unknown, but
they’re covering it all up, and suddenly the tumbleweeds mutate into a “hive”
as such. Your job is to locate the core and destroy it, therefore saving
everyone. The game will start off with this:
Blog Entry 01:
The growth of tumbleweeds has always been unnatural within
this forgotten city, yet daily trimming has kept it at bay.
Until now.
You could write off the radioactive spill as an unfortunate
accident.
That is, if a radioactive plant ever existed near here.
Yet this is an unfair world, and a town against the
government is like an insect against an elephant.
An experiment? A test? Whatever it was, it’s too late now.
You see, the tumbleweeds were already unnatural, so begets the question.
What’ll happen when unnatural is mutated?
Sadly, we found out sooner than expected. It seems the
tumbleweeds truly did mutate into something else, and it appears to hold
intelligence.
A simple tumbleweed? Intelligence? You may scoff, but it
appears to work like a hive. If we can just find the core, and decimate it,
maybe this nightmare will end.
That is, of course, if we can make it there.
What’s that? Get help from outside?
The government caused this; you think we could really leave
here or get help?
Besides, we’ve already tried. The internet is a great accommodation
for such events these days. Sadly, we didn’t realize how far the government
would really go.
“Texas home covered in tumbleweeds”
The fools believe a storm blew it all there.
They’re being spoon-fed this bullshit, and believing it.
Well, whatever. It’s not like there’s much that can be done
now. I just hope this reaches someone, in-case we can’t end this.
They’re still mutating.
The government underestimated the impact the spill has
created, soon enough this place will be overrun and they’ll turn to the outside
world.
Prepare yourselves.
Unknown Sender, 01/03/2013, 5:00 PM
You start off with that message, before it shifts to you on
the computer. This is where you commence, as you shut the computer down and get
up. You’ll see tumbleweeds knocking on all the windows, unnatural smiles in the
midst of their body. You’ll get up, and the gameplay will commence.
Also, after the boss fight at the end, the following will
happen:
After defeating him, you’ll discover the truth of why the
government did this. You’ll find out that the tumbleweeds were always a hive,
but the government did something to them which enraged them, causing them to
attack the humans.
You’ll have two choices.
One is to use all of the mutated genes of all the
tumbleweeds in order to resurrect everyone. If you do this, you’ll have mass
genocide on your hands.
The other choice is to undo whatever the government did, you
won’t be able to save everyone in the city but you can save what is left and
you won’t have the death of the tumbleweeds on your hands. Also, right at the
end, some tumbleweeds will walk up and you’ll see them sacrifice themselves,
reviving your tumbleweed friend. This signifying a friendship between you and
the tumbleweeds.
Gameplay:
I put it as a top-down fighter in order to make it more
realistic, making you feel like you really are a survivor in a town that went
to hell. Everyone has already used the guns, in the first wave of attacks. You’ll
start off with something like a bat, but as you progress you’ll be able to
discover objects that you can use to upgrade weapons or create whole new ones.
These can be missed, making you want to explore. There should also be little
e-notes that you can find which give backstory.
You’ll also receive “mutation genes” every time you kill
tumbleweeds, which act as experience points. Upon level up, you’ll be able to
choose various things like upgrading the abilities you already have, making
whole new ones, or unlocking things you can create/upgrade.
Near the beginning, you’ll meet a tumbleweed who doesn’t
attack you. After careful contact, you consider it friendly and you let it tag
along (it’ll sit on your shoulder). If you’re not careful, he can die, making
the last boss battle a lot harder.
There’ll also be other survivors along your adventure, where
you can make choices depending on what you hold. Say you need a rope to save a
man surrounded by tumbleweeds, but you used it on the last upgrade. On the
other hand, that upgrade could’ve allowed you to hold a gun that gives you a
boost of speed, which could save the man by pulling him out of the circle.
When you rescue a survivor, you’ll be granted a choice. Send
them back to your fortification, or send them back to your fortification and
take all their stuff. Some people will resist, but what it’ll do is lean you
more towards an “evil” person as such.
While to start off with, this’ll seem like it doesn’t affect
you. As you progress, and gain more experience, the mutated genes will react to
your nature and slowly mutate you. While this won’t kill you, it’ll make you an
ugly ass guy. Other various actions can do the same thing, like leaving a man
to die because you wanted that rope.
There’ll only be one boss battle, at the end, which will
reveal itself to be a giant intelligent tumbleweed. You’ll have found out previously
that a tumbleweed mutated in such a way that it can consume something and receive
its energy, or rather its intelligence. This is what made him so smart, so the
way you die is by him grabbing hold of you and consuming you. To combat this,
you’ll need mobility and –uh oh- if you were evil you’ve mutated into a slower
and more cumbersome body. Making it harder to defeat the last boss.
Anyways, he’ll grab you at random times, and has multiple
hands so always be on the move. If you kept your friendly tumbleweed guy, he’ll
combine certain weapons you hold into a weapon that helps you move. Weapon changes
depending on what you hold. He also sends out other tumbleweeds to attack you,
so you have to avoid him whilst fending off the tumbleweeds. To defeat him, you’ll
have to destroy the three cores’ he uses to maintain contact with other
tumbleweeds. Once that’s done, all your weapons will combine together (cause of
the mutation genes from all the cores) and, depending on what you hold, a
weapon will pop out. If your tumbleweed hasn't been killed by the boss yet, he’ll
sacrifice himself to give you his mutation genes which give you the roll ability,
allowing you to avoid his hands a lot easier (since you lose your weapons that
help you move).