(the game from Battle for Dream Island Again episode 5) in a portable or unblocked format, you have several reliable modern options since the original Flash version is no longer supported by most browsers. Most Recommended (HTML5 Port)
Just remember the golden rules:
If you’ve spent any time in the “object show” community—especially the fanbase surrounding the animated web series Battle for Dream Island (BFDI)—you’ve likely heard whispers of a legendary fan-made title: the BFDIa 5B game. For fans seeking to relive the chaotic competition between Firey, Leafy, Bubble, and the rest of the iconic cast, this game has become a cult classic. But there’s a catch: finding a version that is both unblocked (playable on school or work networks) and portable (playable on a USB stick or cloud drive without installation) is the holy grail. bfdia 5b game unblocked portable
Some portable builds retain the 2-player co-op or versus mode, letting you and a friend share the keyboard (Player 1 uses WASD, Player 2 uses Arrow Keys). (the game from Battle for Dream Island Again