The official Serious Sam 2 (the 2005 PC sequel) was never officially released for Android by Croteam or Devolver Digital. The version you’ve seen online is an unofficial port or modded APK based on the Serious Sam Classics: Revolution engine. Because of this, you won't find it on the Play Store. You must side-load it.
That said, the "fixed" version is considered abandonware by the community since the developer no longer sells or supports it. Downloading it is for preservation and personal use. download serious sam 2 for android fixed
(the one with the cartoonish style) does not have a native Android port, its predecessors do. Most "Serious Sam 2 Android" searches actually intend to find: Serious Sam: The Second Encounter (Classic) This is a different game from Serious Sam 2 The official Serious Sam 2 (the 2005 PC
Serious Sam 2 on Android, you must use a Windows emulator like You must side-load it
Since there is no official mobile version of Serious Sam 2 , "fixed" Android versions typically refer to unofficial fan-made source ports or emulation setups. Most current mobile efforts focus on the Serious Sam Classics