=> BoardGameGeek PLUS 7 Expansions (in order of release – first three add a player):
=> Incursion // Conflict // Alliance // Storm // Dominion // Eons // Odyssey
=> 2pg Rules Summary (not Len’s though) with Added Reference Card
=> Quick Start Guide (Official Comic Style)
=> Core Game Rulebook (Official) 2018
=> Rulebook (official) 2008 (some say it’s better)

=> Master Alien Selector v7 Spreadsheet (make a copy for yourself) / or BGG Master Aliens Selector v7 Color Coded – List PDF (Helps Choose Aliens)
=> Alien Database (figures someone would do this:)
=> Alien Sheets / Alien Tips (Fandom Wiki)
=> 3D printing planets for the game (an article about doing it – VERY time consuming) / video of them

=> Len’s Alien List v5 Color coded (2 columns per page color coded by alert AND expansion)

=> Play Online (web based)

=> Select an Alien by number (1-238) [repeat if needed]

How to play each Alien (for and against):

=> Base Game
=> Cosmic Incursion
=> Cosmic Alliance
=> Cosmic Conflict
=> Cosmic Dominion
=> Cosmic Storm
=> Cosmic Eons
=> Cosmic Odyssey

=> Video playlist

Great Overview plus How To Play:

Interesting View – playing nice (mostly… well, kind of :)

How to Play in THREE MINUTES:

Watch six players play the game – hilarious! … then after that, the next video is a four player game where they play VERY differently! Then ANOTHER game with these same six players!

Four player game:

Another game with those same six players:

Overview and REplay of a game explaining WHY people made the plays and moves they did in the game! Interesting discussion about the How’s and the Why’s (odd that YouTube doesn’t display their nice image for you to click on, but it still works!)

History and Explanation of the game:

New Review of one of his current favorite game of all time (from the Dice Tower)

A great chaotic negotiation game (old review from the Dice Tower)

EXPANSIONS

Each expansion typically adds at least 20 more aliens PLUS a couple other cool things to the game. The base game can play up to 5 players … but a 6 player game is supposed to be the “Sweet Spot”, so one of the three expansions that includes another player would be an important expansion (Incursion, Alliance, Conflict). The consensus is that Cosmic Incursions is the best of all the expansions! First … a quick overview of all the expansions:

One Reviewer looks at all the Expansions:

Another Reviewer (who actually is a co-developer of some of the expansions) looks at them completely differently:

Next … the favorite expansion:

Cosmic Incursion

Adds Orange Player, 20 Aliens, Reward Deck, Cosmic Quakes and Negative Attack cards

=> *Cosmic Incursion Rules (Official) // => BoardGameGeek

Cosmic Dominion

Adds 30 aliens, more Reward Deck cards plus Mother-ships

=> *Cosmic Dominion Rules (Official) // => BoardGameGeek

Note: Hmm. YouTube link image is not working – but clicking it still works fine!

Cosmic Odyssey

Adds 4 game campaign, 30 new aliens, 12 improved aliens, Reward cards, Evolution cards, Essence cards, Lux cards, Moons, Satellites, Master cards, Hazard cards, Objective cards, Privilege cards, Technology cards and Wrench

=> *Cosmic Odyssey Rules / Campaign Guide (Official) // => BoardGameGeek

Discussion with a Designer and Publisher:

Cosmic Storm

Adds 25 new aliens and Space Stations

=> *Cosmic Storm Rules (Official) // BoardGameGeek
space stations and 25 new aliens

INTERESTING … first a review that LIKES this expansion A LOT (says all the aliens are great). Then watch the next review that is the opposite – basically HATES this expansion and thinks that most of the aliens are mediocre or just terrible.

Other non-essential Expansions

Cosmic Alliance

Adds 20 aliens, White player and Team play

=> Cosmic Alliance Rules (Official) // => BoardGameGeek

Cosmic Eons

Adds 30 Aliens, Alliance Dials and Essence cards

=> Cosmic Eons Rules (Official) // => BoardGameGeek

Cosmic Conflict

=> Cosmic Conflict Rules (Official) // => BoardGameGeek
with Saboteur and 20 new aliens

The Game:

Variants

Most players use the Reward Deck and sometimes the Hazard Deck and once in a while the Tech Cards.