: You can extend a grenade's life by tossing it with secondary fire (mouse2), then immediately catching it with the Gravity Gun. This resets its fuse and lets you launch it like a high-speed projectile.
: Use the double-shot (secondary fire) for close-range finishes. Movement and Survival Half-Life 2: Deathmatch on Steam
: In HL2:DM, the Gravity Gun is a top-tier weapon. Use it to hurl toilets, radiators, and explosive barrels for instant or near-instant kills.