Your opinion on the best concept for a multiplayer game!

A game like mirrors edge but multiplayer would be cool

We need a Co-op survival horror game ( not like Left 4 Dead or Killing Floor but like Resident Evil 3 )

Well here's an idea that i never see anyone to fulfill complety... hmm there are some guys but.. they still developing.
Theres a lot of zombie shooters right? They are good but not showing zombie apocalipsys fully.
Well here's the idea.
We have town and some countryside territory. Zombies, walking on the streets and woods.Main player and his friends looking for each other.Toxic spreading little by little over town.No food, no weapons, no hope. Players can baricade themself, search for food, search for each other, but they eventually dying, from hunger, from toxic, from zombies, from each other.
Well something like that.I think there won't be a game or a mod that fully present feeling of death but from who or what and when.
What's needed realism, horror, instant death, no hope, score's like how much days you survived and what you done, 3d shooter, uncontrolled behavier(like if there's 50 zombies you'll be scared to shoot),toxic, woods,homes and flats(you can enter everywhere and secure home by using tools, planks, tub).
Well something like that... if you interested i have a lot of ideas, but i need specifications to give a good idea.

I was thinking, why not take an entirely different route, why does it always have to be experience and levels? why not have something like that multiplayer Castlevania: Harmony of Despair or Monster Hunter for example where you only get better when you get better gear or make some yourself or where your abilities don't level up by experience but by using them more than others, that would make every character you make be a different experience, you would find or craft other things and advance other skills and unlock more from that specific skill tree by using the lower skills from that tree for example.
lets take a basic spell as an example in a magicka style system but with the added comfort of leveling up those spells: you would have a fireball and a darkness spell, you could either use them seperately or fuse them to create a new element called dark fire, which would enhance the demon skill tree, another example is you have a water and a fire spell you create a steam spell which would increase your steam skill tree so you can unlock those new spells as single handed ones usable without fusion if you use the fusions often enough.

A DAMN CO-OP RPG! That's what we need. Or at least Co-op with at nice long story campaign. Not some 10 minute missions. I'm talking open-world, long-term coop gameplay. Haven't seen that for ages!

There are already too many fast paced action multiplayer games for the Source Engine. I'd really like a different approach.

I don't know if you are looking for a 2, 4, 16, 32 or 1983409587304 player game. Some years ago I've played a mod for UT99 which was just awesome, since you were able to play it singleplayer, coop (2-4 player) or team based (up to 32 players) without changing the maps. It was called "Thievery UT" and put the gameplay of the Thief series to a multiplayer game. It should give you some interesting ideas of what is possible in stealth coop play.

PortalGun v GravityGun PvP combat

Co-Op parkour game or a medieval first person fighter, although the second one is already being developed, but I don't know the name, god damn it!

Hey there :D you played Vindictus ? It is using Source Engine, and game is awesome, it's MMORPG, with a nice combat system. Is it possible to make something like that? If yes, I have few ideas.

Would love to see PvP medieval fantasy game with only little/not at all grinding and pay to win things... And I have always wanted to see an online game where for example spells would be cast with combination of mouse movement and buttons, and sword attacks could be done and parried by placing your weapon right way. No idea if this would be possible with source however.. Know much nothing about it.

A Sweet game would be like mirrors edge where you can race other payers, co-op or pvp.

You have to be able to see your own shadows and your legs.

Ricochet 2.

Personally I think you should use UDK but its up to you

A racing game and a FPS, two games but both at the same time, the FPS takes place on a raceing track, and you must dodge cars while doing battle multiplayer, and the racing game allows you to race admist a FPS game, imagine, you are playing a racing game and you can run over a friend while he plays another game

Fast - and by fast, I mean FAST. Think Tribes or Nexuiz Classic.

If you could mix: AaAaAaAAA!!!, Nexuiz, and inMomentum, that'd be great.

I like my games to have complete freedom of movement. I'm tired of moving at the pace of a cripple in games.

This sounds like something which would be hard to code but I enjoy games which have dynamic features, a good example was the game split/second which allowed you to build up boost, then activate events (at the cost of boost) which altered the track or could eliminate opposition. It might not have been totally unpredictable but it added an element of excitement because you could never be 100% sure which events would be triggered in each race. Now this is just an example, something similar could be added to different genres too. (Also an FPS focused on stealth which includes parkour sounds nice ;) )

Racing game where you only have 2 speeds. 0MPH and 10,000 MPH. Did you just run over a little child? who knows? how does that make you feel?

Imagine if in new Guitar Hero you play as a busker, you witness your city evolve as your music changes the decisions of people around you

Imagine a videogame that knew what you had eaten that very day and went on to effect the story arc of the game.

A Very great quality minecraft , with multiplayer and some different stuff.

One word - Battlefield. That's all.

Persistence is the way to go in terms of best gameplay. Find a way to build a persistent metagame and you'll be ahead of the competition. Recent-generation FPS games have the leveling/unlock systems, TF2 and MMOs have item/inventory systems... be creative.

In terms of core gameplay mechanics, try and avoid the ultra fast-paced, adrenalin twitch-shooting of the Call of Duty series. Realism tends to build you a set of loyal fans but (as the Call of Duty example shows) may not appeal to the lowest common denominator, so find a balance.

I would dodge the issue of having to deal with combat pacing and balance by going for a co-operative focused game.

Police Warfare had everything going until they shut down their kickstarter.