: Look for cracked walls, suspicious barrels, or dark corners that seem out of place.

: Heavy weaponry like Rocket Launchers and Plasma Rifles become mandatory to deal with massive boss-like mutants and screen-filling hordes. 3. Finding All Secrets

: These provide automated cover fire and are excellent for keeping small zombies away while you focus on heavy targets.

: Purchasing the Radar item from the shop allows you to spot hidden crates and secrets on your mini-map, making a 100% run much easier. 4. Cheat Codes for Quick Progress