/tg/Station 13

Infinity Wars Mode: A gamemode in which both Thanos and the crew have to explore places to ensure either side doesn't win.
A single player is selected to be Thanos. They spawn with the empty Infinity Gauntlet and a quest to retrieve all six Infinity Stones. The crew is immediately aware of his presence when he arrives and must do all in their power to stop him. He is physically strong and has a lot of health. To prevent scinerds from just nuking him, anything that would instagib him instead only brings him down to red.
Space Stone: The Supermatter core. Extracted by literally shattering the Supermatter. Thanos is immune to holding the core of the shattered Supermatter barehanded but will slowly burn to death if pushed into the supermatter before it is destroyed. Alternatively, as even more incentive for captains, it could also be inside the nuclear disk.
Soul Stone: Found in Lavaland, it appears as a massive pit in the middle of the lavaland map. Thanos must toss Ian in it to receive the Soul Stone.
Mind Stone: Found within the AI. Once there, he may retrieve the Mind Stone by deconstructing the AI and removing it from the chassis. If no AI exists in the round, it can be found within a random borg instead, and may be retrieved by deconstructing the borg and taking it the same way you remove an MMI from a borg. If there is no borg at all, it can instead be found with a scientist or the RD as an useless scepter.
Reality Stone: A powerful artifact held by the Syndicate. It can be found in the Nuclear Operative base in a new room that contains various unusable or dangerous-to-touch artifacts under study by the Syndicate itself. Thanos and the crew both have the ability to teleport here as an exclusivity to this round - the stone itself is held within a beaker, and solidifies when Thanos obtains it.
Time Stone: The Wizard Federation's most prized artifact created by its founder to contain the time-manipulation powers. All wizards with the Time Stop spell draw some power from this. The crew and Thanos can teleport to the Wizard Federation's Tower, its headquarters, to retrieve it. It is under heavy guard by completely useless NPC wizards, and, if datum antags were implemented, would likely be under the possession of some lucky player-controlled wizard. The Eye itself possesses all the abilities Thanos has when the stone is in his gauntlet (see below). Should be one of the last stones to be acquired, as getting it will spawn in 3 player-controlled Wizards.
Power Stone: An artifact retrieved by a band of ragtag space pirates given to Nanotrasen for a pardon of all their crimes. The crew and Thanos can teleport to a special version of Central Command with useless NPC Nanotrasen dickheads in it, where it can be found alongside some other top secret Centcomm stuff in an orb-shaped containment unit. This is ideally one of the last stones to be acquired, as retrieving it will activate a deathsquad.

When one of the stones is in his gauntlet, Thanos gains special abilities related to them.
Space Stone: TK and allows Thanos to teleport, but only in the hand the gauntlet is in. If used in Lavaland with the Power Stone, Thanos can literally pull one of the asteroids surrounding it for one heck of an explosion. This can only be done once. It is also capable of creating a gravity well that sucks in players and objects ala Liquid Dark Matter.
Mind Stone: By touching someone with help intent, their body will be taken over by a hostile critter AI that will attack other crewmembers for a minute or so. Whacking the guy in the head will fix it.
Reality Stone: Can turn guns into bubbles, turn crewmembers for ten seconds into weird shit, and spawn a random critter incapable of doing more than 5-10 brute damage at once with no ranged attacks.
Power Stone: Can shoot extremely painful blasts of energy, and unleash a damaging shockwave. It can also power APCs and cyborgs (in fact, power them so much they can even explode) and machinery - doing so will keep them up for a looong time, even if their original powersource is destroyed. Will instantly recharge guns and anything else handheld that needs recharging.
Time Stone: Can ungib Ian and crew, can do a local Time Stop like the Wizard spell, can unbreak destroyed Infinity Stones.
Soul Stone: Gives Thanos the ability to see crewmembers in thermal vision (they appear tinted orange) and know Unknowns by their real name. Additionally, it transports Ian and all snapped crew to a pocket dimension within the Stone.

Thanos cannot be put to sleep - anything that'd make him sleep will instead stun him for sometime. His gauntlet takes longer to remove than other articles of clothing and comes with a special message.
Once all Stones are collected, Thanos can use the *snap emote (up to softcrit, if in hardcrit he'll be unable to use it) to instantly firegib half of all player-controlled, sapient mobs. Doing this will also teleport him to the Soul Stone where he may "converse" with Ian. He will immediately win and the round will be over.
If the crew kills Thanos before he can *snap, the crew immediately wins and the round will be over.
The shuttle cannot be called until Thanos is dead or he has snapped - his minions will be interfering with it.
The crew can destroy any stone except the Reality Stone and the Time Stone. This will keep it off Thanos' hands until he gets the Time Stone.