We discuss an extension to the MSSM, so-called MSSM4G scenario, which realizes Bino dark matter compatible with the observed relic density by introducing 4th-generation particles. This scenario has many implications for current and future BSM searches. In particular, it will provide characteristic signals in gamma-ray observations and/or LHC experiments. We will see that the two types of searches work complementarily, and the combination will allow us to discover or exclude the MSSM4G models in the next few years.