Westward Expansion (can only send subs to left of your screen, limited to North and South (91 degrees to 269 degrees), even if it means not getting the closest outpost, dormants included)
Specialized Combat (all subs must contain at least one specialist, including in the beginning when capturing dormants).
Magic Number (All subs must have exactly a certain number of drillers that each player must publicly announce on the first day. No more, no less. You may change your 'sub number' in the public chat every day and only once a day, but this must be publicly announced. No subs can be launched with the new number until you have announced it) - by blanc
Lockdown (No dormant outposts may be taken) -by tw2000
Blind attack (Your subs may only arrive at an enemy/dormant outpost which is not in your sonar range. Subs may arrive at your own outposts without limitations. If your sub was travelling to an outpost which did meet these conditions before but doesn't anymore the sub could arrive the sub must be gifted or,if possible, redirected, before arrival. However, you are not allowed to purposely gift drillers to an outpost which does not meet the conditions at launch) - by tw2000
Auctioned Hire (For every hire except the first, a person must put up one of their specialists on auction (starting bid 20 drillers, promoted specialists 50 drillers) which anyone can bid on for nine hours. Person selected to auction a specialist is set by predetermined order. The winner then must exchange a gift of drillers to the person with the sold specialist, and no other player may capture or interfere during this process including the origin and receiving outposts. The movement of the pay and sale must happen one hour after the bidding period. If an auction happens between two allies, the driller and specialist transfer still has to occur. If no one auctions within 9 hours, the auctioneer retains their specialist. Winner of the specialist is determined by the highest amount at the end of the nine hour period, announced in alternate public chat (a "private" message addressed to all players like in ESG 01) - by pandasecret

Please comment if you want to participate one of these formats:
1. "Participation: Yes, Restrictions: none"
or
2. "Participation: Yes, Restrictions: only if [Idea X] gets chosen."
1 is for if you don't care about the experiment and just want to be in, and 2 is for when you only want to join if a specific experiment is chosen, and otherwise will be ignored if the chosen experiment will be something other than you specified (multiple restrictions are allowed).

Participating:
Pandasecret (host)
r10t--
v3xt
zerashi
kingtwyf1
tw2000
thekorfballer
square
mathwhiz9 [only for Lockdown and Magic Number]
blanc [only for Specialized Combat and Magic Number]

Participation: Yes, Restrictions: none

Participation: Yes, Restrictions: Only if Lockdown or Magic Number is chosen

I'm in for any!

Participation: Yes, Restrictions: none

Participation: yes Restrictions: none

Let it be said I only typed it like this because peer pressure

I'm happy with all modes, would like to participate! No restrictions

Yup and no restrictions.

Yes, but only for Magic Number or Specialized Combat

Wait who came up with specialised combat and westward expansion?
I think I was the first person to mention directed subs.
I can't remember who mentioned the specialist thing though...
I believe everyone should get credit for their ideas