I was discussing a sort of party-game esque shooter.
The idea is that you have only "stealth" weapons, and using them is not a good idea. How so?
1. The entire game is based around team play. 4 teams of 4 people each have their own radio frequency- players talk over a mike, and anyone nearby them as well as tuned into their radio frequency will hear them, in addition to some areas where speech is broken or garbled due to bad signal.
2. Enemy players will hear you if you're close enough, or if they're tuned into your radio. You can monitor who's on your signal with tools like a smartphone (if that app is on your class loadout), but there are counter-tools to this, and often a player will be identified by staring at a phone.
3. NPCs are simplistic- they follow assigned paths, enter and exit buildings inconsequential to the players (rendered, they can still go in or out), occasionally say things, especially if prompted (bumping into one, for instance), and will do some actions similar to what a PC can do (look at a smartphone, for instance.) With cloud computing, players can save multiple voice files to their game session so NPCs are not as easily distinguished from real players by simply "his voice is strange."
4. You have many goals, depending on the map, ranging from stealing information or hacking a terminal to assassinating/protecting a VIP player; you are given tools to complete these objectives.
5. Your class is simple, choosing a loadout type, then things like weapons and apps for your phone. A light character might be able to scale a fence or climb along a gutter in a dark alley, but will only have a silenced pistol useless against body armor. A well armored character might not move as fast as the others.
6. Speech is always important, as events in the game will require you to talk, and therefore, to possibly expose yourself to the enemy team. Unexpected things, such as a cop patrolling an area that you need to infiltrate, will require teamwork. An enemy may easily stroll by and pick up on your plan.
7. This is a party game in that it's not about kills, it's about objectives. Most players will use a tazer over a gun, aside from assassination missions. In some game modes, silly things happen. You could possibly MAKE silly things happen, such as hijacking a parade float and crashing it into the bank. This is done a variety of ways- you could jump in, risking detection by police and recognition by even NPCs, do it with certain apps over your phone and risk detection by PCs, or other ingenious methods, such as planting a wireless bug on the van then using an app to cause it to veer off the road with minimal contact from you. Generally, elaborate plans are better.
8. Stealing radio frequencies is possible. Letting a teammate die/fall into enemy hands often spells game over if they are given time to hack your frequency- you'll either have to go without radio or risk them listening, breaking codes you use, or things of that nature.