For hypothetical readers, I recommend these game threads in the following order:

[Admin] Introduction is a general orientation to the game setting and my GMing style.

[Meta] Character Profiles is a who's-who of Grey Cell and Task Force 47.

To see how we got here, check out the [IC] Prelude threads for the recruitment scenes of the original five PCs:
• "Dancer" Kowalska
• "Bullfrog" Durand
• "Double Down" Omdahl
• "Dealer" Dacovetti
• "Lizard King" Choi

[IC] The Workup depicts Grey Cell's formation (and my trial run at GMing PbP combat) and the briefing for...

[IC] Chapter One - The Advance Team and [IC] Chapter One - The Main Body saw Grey Cell deployed to Libya to retrieve a pair of physicists in whom Da'esh - and certain reptilian parties - had expressed an unseemly interest.

[IC] Chapter One - Aftermath has some of the fallout from the first mission.

[IC] Chapter Two took the team to Australia to investigate another suspected reptiloid appearance and unveiled a second alien species.  The side story [IC] Chapter Two - Andrey's Op introduces "Roulette" Vasilyev on an intersecting course with Grey Cell.

[IC] Chapter Two - Aftermath contains interludes between the Australia operation and the following mission.

[IC] Chapter Three takes the team to Florida to investigate a series of mysterious deaths among retired U.S. Navy personnel.

[IC] Chapter Three - Aftermath gives the team a too-brief respite as they attempt to comprehend the artifacts they've recovered and process their losses.

[IC] Chapter Four returns Grey Cell to the Caribbean, this time striking at the aliens in Cuba.

If you're a prospective player, a PDF or dead tree copy of Twilight: 2000 (version 2.2) is key to understanding the rules, though I do try to make the dice as transparent as possible during narration.  Also, the other threads marked [Admin] and [Meta] will be of use.
This message was last edited by the GM at 01:58, Thu 21 June 2018.