diff --git a/socials_util/__init__.py b/socials_util/__init__.py
index 473cd8e..25decff 100644
--- a/socials_util/__init__.py
+++ b/socials_util/__init__.py
@@ -60,10 +60,12 @@ class SocialSiteId(aenum.Enum):
     COHOST_PROFILE = 117203288
     SOUNDCLOUD_ARTIST = 3040
     IGDB_GAME_ID = 5794
+    STEAM_APPLICATION_ID = 1733
 
     GITHUB_REPOSITORY = 364
 
     PLURK = 32111
+    LINKEDIN_PERSONAL_PROFILE = 6634
 
     # Browser bookmarks
     FIREFOX_PROFILE_BOOKMARKS = 33
@@ -141,7 +143,9 @@ WIKIDATA_PROPERTIES = {
     SocialSiteId.COHOST_PROFILE: WikidataInfo(None, 117203288),
     SocialSiteId.SOUNDCLOUD_ARTIST: WikidataInfo(3040, None),
     SocialSiteId.IGDB_GAME_ID: WikidataInfo(5794, None),
+    SocialSiteId.STEAM_APPLICATION_ID: WikidataInfo(1733, None),
     SocialSiteId.GITHUB_REPOSITORY: WikidataInfo(None, 364),
+    SocialSiteId.LINKEDIN_PERSONAL_PROFILE: WikidataInfo(6634, None),
 }
 
 def re_social_subdomain(main_domain):
@@ -319,11 +323,17 @@ REGEXES = [
     # IGDB
     (re_social_path_adv('igdb.com', 'games', RE_ID), SocialSiteId.IGDB_GAME_ID),
 
+    # Steam game
+    (re_social_path_adv('store.steampowered.com', 'app', RE_ID, RE_ANY_SUBPATH), SocialSiteId.STEAM_APPLICATION_ID),
+
     # Github
     (re_social_path_adv('github.com', RE_DUAL_ID), SocialSiteId.GITHUB_REPOSITORY),
 
     # Plurk
     (re_social_path_adv('plurk.com', RE_ID), SocialSiteId.PLURK),
+
+    # Linked in
+    (re_social_path_adv('linkedin.com', 'in', RE_ID), SocialSiteId.LINKEDIN_PERSONAL_PROFILE),
 ]
 
 WELL_KNOWN_MASTODON_INSTANCES = frozenset({