diff --git a/app/frontend/images/crescent/bg.jpg b/app/frontend/images/crescent/bg.jpg
new file mode 100644
index 00000000..47c01e22
Binary files /dev/null and b/app/frontend/images/crescent/bg.jpg differ
diff --git a/app/frontend/images/crescent/logo.png b/app/frontend/images/crescent/logo.png
new file mode 100644
index 00000000..2ed4f2f4
Binary files /dev/null and b/app/frontend/images/crescent/logo.png differ
diff --git a/app/frontend/images/sso_apps/crescent.png b/app/frontend/images/sso_apps/crescent.png
new file mode 100644
index 00000000..acf98238
Binary files /dev/null and b/app/frontend/images/sso_apps/crescent.png differ
diff --git a/app/models/onboarding_scenarios/crescent.rb b/app/models/onboarding_scenarios/crescent.rb
new file mode 100644
index 00000000..da6fac8f
--- /dev/null
+++ b/app/models/onboarding_scenarios/crescent.rb
@@ -0,0 +1,23 @@
+module OnboardingScenarios
+  class Crescent < Base
+    def self.slug = "crescent"
+
+    def title = "Let's create a Hack Club Account!"
+
+    def form_fields = [ :first_name, :last_name, :primary_email, :birthday, :country ]
+
+    def slack_user_type = :full_member
+
+    def slack_onboarding_flow = :internal_tutorial
+    def slack_channels = chans(:crescent_bulletin, :crescent_help, :crescent_chat, :identity_help, :help, :welcome_to_hack_club, :slack_guide, :library, :lounge, :welcome, :happenings, :community, :announcements, :news_wire)
+
+    def first_step = :welcome
+
+    def next_action = :home
+
+    def logo_path = "images/crescent/logo.png"
+    def background_path = "images/crescent/bg.jpg"
+
+    def card_attributes = { wide_logo: true }
+  end
+end
diff --git a/app/models/special_app_cards/crescent.rb b/app/models/special_app_cards/crescent.rb
new file mode 100644
index 00000000..7a0aca46
--- /dev/null
+++ b/app/models/special_app_cards/crescent.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module SpecialAppCards
+  class Crescent < Base
+    def visible?
+      identity.ysws_eligible != false && Flipper.enabled?(:app_card_crescent_2026_09_23, identity)
+    end
+
+    def friendly_name = "Crescent"
+
+    def tagline = "Four different challenges each week - pick a card, then ship something!"
+
+    def icon = "crescent.png"
+
+    def url = "https://crescent.hackclub.com/?utm_source=hca"
+
+    def launch_text = "onwards!"
+  end
+end
diff --git a/config/flipper_features.yml b/config/flipper_features.yml
index 47e4dfb0..1be09952 100644
--- a/config/flipper_features.yml
+++ b/config/flipper_features.yml
@@ -10,6 +10,7 @@ shared:
   app_card_hctg_2026_03_19: enables HCTG app card on the welcome page
   app_card_blueprint_2026_01_14: enables Blueprint app card on the welcome page
   app_card_forge_2026_09_19: enables Forge app card on the welcome page
+  app_card_crescent_2026_09_23: enables Crescent app card on the welcome page
   full_user_open_floodgates_2026_04_06: provisions users as full Slack members instead of multi-channel guests
   dev_allow_manual_flow_2026_05_27: enables the manual document verification flow for an actor
   disable_slack_invites_2025_12_08: suppresses Slack SCIM provisioning for an actor
diff --git a/config/slack_channels.yml b/config/slack_channels.yml
index bd8884ef..89c41129 100644
--- a/config/slack_channels.yml
+++ b/config/slack_channels.yml
@@ -90,3 +90,6 @@ shared:
   leaders_bulletin: C0AQ1CG4JLD
   news_wire: C0BJ6LTLAFJ
   snowglobe: C0BPM9KRW8L
+  crescent_bulletin: C0C3EH0ACPQ
+  crescent_help: C0C3BHDUHT7
+  crescent_chat: C0C3A8NUJ1H