diff --git a/resources/lib/twitch/api/parameters.py b/resources/lib/twitch/api/parameters.py
index 690fd45..2982058 100644
--- a/resources/lib/twitch/api/parameters.py
+++ b/resources/lib/twitch/api/parameters.py
@@ -84,8 +84,38 @@ def validate(cls, value):
 
 class Language(_Parameter):
     ALL = 'all'
-    # add twitch supported language codes
-    _valid = [ALL]
+    EN = 'en'
+    DA = 'da'
+    DE = 'de'
+    ES = 'es'
+    FR = 'fr'
+    IT = 'it'
+    HU = 'hu'
+    NL = 'nl'
+    NO = 'no'
+    PL = 'pl'
+    OTHER = 'other'
+    ASL = 'asl'
+    KO = 'ko'
+    JA = 'ja'
+    ZH = 'zh'
+    TH = 'th'
+    AR = 'ar'
+    RU = 'ru'
+    BG = 'bg'
+    EL = 'el'
+    CS = 'cs'
+    TR = 'tr'
+    VI = 'vi'
+    SV = 'sv'
+    FI = 'fi'
+    SK = 'sk'
+    PT = 'pt'
+
+    _valid = [ALL, EN, DA, DE, ES, FR, IT, HU, NL,
+              NO, PL, OTHER, ASL, KO, JA, ZH, TH,
+              AR, RU, BG, EL, CS, TR, VI, SV, FI,
+              SK, PT]
 
     @classmethod
     def validate(cls, value):
diff --git a/resources/lib/twitch/api/v5/games.py b/resources/lib/twitch/api/v5/games.py
index d2aa7d0..564bc46 100644
--- a/resources/lib/twitch/api/v5/games.py
+++ b/resources/lib/twitch/api/v5/games.py
@@ -1,8 +1,9 @@
 # -*- encoding: utf-8 -*-
 # https://dev.twitch.tv/docs/v5/reference/games/
 
-from twitch import keys
+from twitch import keys, methods
 from twitch.queries import V5Query as Qry
+from twitch.queries import HiddenApiQuery as HQry
 from twitch.queries import query
 
 
@@ -13,3 +14,42 @@ def get_top(limit=10, offset=0):
     q.add_param(keys.LIMIT, limit, 10)
     q.add_param(keys.OFFSET, offset, 0)
     return q
+
+
+# required scope: none
+# undocumented / unsupported
+@query
+def check_follows(username, name):
+    q = HQry('users/{username}/follows/games/isFollowing')
+    q.add_urlkw(keys.USERNAME, username)
+    q.add_param(keys.NAME, name)
+    return q
+
+
+# required scope: none
+# undocumented / unsupported
+@query
+def get_followed(username):
+    q = HQry('users/{username}/follows/games')
+    q.add_urlkw(keys.USERNAME, username)
+    return q
+
+
+# required scope: user_follows_edit
+# undocumented / unsupported
+@query
+def follow(username, name):
+    q = HQry('users/{username}/follows/games/follow', method=methods.PUT)
+    q.add_urlkw(keys.USERNAME, username)
+    q.add_data(keys.NAME, name)
+    return q
+
+
+# required scope: user_follows_edit
+# undocumented / unsupported
+@query
+def unfollow(username, name):
+    q = HQry('users/{username}/follows/games/unfollow', method=methods.DELETE)
+    q.add_urlkw(keys.USERNAME, username)
+    q.add_data(keys.NAME, name)
+    return q
diff --git a/resources/lib/twitch/keys.py b/resources/lib/twitch/keys.py
index ffe2b15..fb1bfad 100644
--- a/resources/lib/twitch/keys.py
+++ b/resources/lib/twitch/keys.py
@@ -68,6 +68,7 @@
 TOKEN = 'token'
 TYPE = 'type'
 USER = 'user'
+USERNAME = 'username'
 USER_AGENT = 'User-Agent'
 USER_AGENT_STRING = ('Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) '
                      'Gecko/20100101 Firefox/6.0')