maybe this has been discussed before, i don't know, but WHAT IF...
one of them just stops collaborating half way in the game?
i mean - if you give all players something that will bring them victory or eventually destroy them, somebody will sooner or later stop cooperating and waste everything, so both die.
like, you have to find stuff to survive, but you have to work together. so if one of them stops helping, both die and no one wins?
Rise of nations had the similar "problem" where you had nuclear weapons you could use to win, but losing player could easily abuse them in a situation where he could only defend and nuke everything to armageddon, so no one won. only "moral" victory for the before-armageddon-winning guy.
just throwing some thoughts around.
Hmm. You bring up a good point. Both players would die if one player just stopped cooperating. Not too sure what I could do about folks just giving up on coop like that... Maybe I could have the AI director keep things a bit more balanced so that the loosing player doesn't gets too frustrated? Or just have more ways for the losing player to come back in general...
If folks are feeling uncooperative in general, I could just make a free play mode for folks who want to fuck around and murder each other.
...Another thing your post just made me think of: Like, say if one person had the food that the other player needed to win, and right before the other player could kill him, that person ate all the food.... In that case, maybe eating their body would provide more nourishment? We shall see.
also, last time i worked with GM local and global connections worked the same way, so if you get LAN stuff done, you have global too.
Thanks for the help! I'm pretty familiar with GM, but not with any of its networking capabilities. Still, my priorities lie with the 'two folks on one PC' setup; then I'll take care of online play later.
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The game will feature limited jetpack use. Why? Because it's unrealistic for these little guys to be able to jump twice their height... and because it feels too stiff when the player can only jump a smidgen. The solution? Jetpacks. They'll come auto-installed on your players.

They'll only run for a second or two at first (and will operate like the jetpack in Cave Story). But by finding certain supplies, you can upgrade them. In fact, food and water aren't the only collectibles on the planet. Aside from equipment, you can find crystals (original, I know) which you can use to upgrade your tools (blasters, drills, energy saws, scanners, etc) which you can then use to find more food and water... and maybe explore just what Vergessen has to offer.
Also made a little edits here and there to the female's run animation.

EDIT: Just realized that her head looks mildly retarded... I'll have to change that.