Want to dive deeper into retro Minecraft versions? Check out our guides on Alpha 1.2.6 and Beta 1.7.3.
For users who cannot download or run any external files, browser-based emulation is the king. The most famous host for unblocked old Minecraft is (and its derivatives), but for version 1.5.2 specifically, you want Eaglercraft . Unblocked Minecraft 1.5.2
Disable your network adapter briefly while launching the game. Version 1.5.2 will timeout its "checking for updates" quickly and launch in offline mode. Want to dive deeper into retro Minecraft versions
Minecraft 1.5.2 for windows 10, you can even play it at school as it's unblocked. Not created or cracked by me. The most famous host for unblocked old Minecraft
The era of simply opening a tab and playing Minecraft is ending. Moving forward, "unblocked" will mean playing on your own hardware (laptop) on a cellular hotspot.