It can be found in several WC mappack maps, such as "sky_walk10.vmf" (with a dark skin, a secondary gun and an antenna), or "sniper_029.vmf" (with camouflage skin, no antenna and no secondary gun). It appears in airex_02 as a mini-boss, coming out of a garage that Gordon unlocks. Once unlocked the tank will come out and start blasting at Freeman, reloading every four seconds. The only way to destroy it is to use a FIM-92 Stinger or a Resistance RPG. Once destroyed the player would proceed to the next area. It was cut along with the Conscripts, the APC being the only armored fighting vehicle left in the final version of the game.
Four tank sounds originally used by the Merkava are still in the Half-Life 2 sound files, in the folder "/sound/vehicles/", while six are in the playable Half-Life 2 Beta sound files, in the same folder.
The Tank has AI and can shoot at the player in the playable Beta.
The tracks on the tank do not move at all when the tank moves.
The tank takes two FIM-92 Stinger rockets to destroy.
In airex_02 once the tank is blown up an engine sound can still be heard.
If the tank is destroyed in sniper_029 a screaming Combine soldier can be heard.