Droidspaces is a container runtime that uses Linux kernel namespaces to run full Linux distributions with a real init system (systemd or OpenRC) as PID 1. Unlike traditional chroot, which simply changes the apparent root directory, Droidspaces creates proper process isolation. Each container gets its own PID tree, its own mount table, its own hostname, its own IPC resources, and its own cgroup hierarchy. The result is a full Linux environment that feels like a lightweight virtual machine, but with zero performance overhead because it shares the host kernel directly. Droidspaces is designed to work natively on both Android and Linux Desktop. On Android, it handles all the kernel quirks, SELinux conflicts, and encryption gotchas that break other container tools. On Linux Desktop, it works out of the box with no additional configuration needed. The entire runtime is a single static binary under 150KB, compiled against musl libc with no external dependencies.