: Upgrading weapons is expensive later on.
In some missions, certain secrets become unavailable after specific events. For example, some secrets in M.A.G.M.A Bunker alien shooter 2 reloaded all secret place top
For a complete visual walkthrough of every secret by mission, refer to SvalPlay's Mission Walkthroughs on YouTube. Alien Shooter 2: Reloaded - Walkthrough With Secrets : Upgrading weapons is expensive later on