As part of this week’s weekend deal on Steam, Valve has slashed the price on its cooperative zombie shooter Left 4 Dead to just $24.99 — a 50 percent reduction.

So if you’ve somehow managed to avoid the title up until now, don’t let this offer pass you by. The game was worth it at $50, it’s no doubt a must-buy at $25. Not to mention, the first major update is due out later this spring, which will add survival mode along with Dead Air and Death Toll as versus maps. There’s really never been a better time to join the ranks of the hunters and hunted.

Read more: Left 4 Dead Survival Pack Hits XBLM April 21, Left 4 Dead Free, 40 Percent Off This Weekend Only, Left 4 Dead Gets A Crash Course With New DLC, Left 4 Dead Survival Pack, Source SDK Hits This Spring, Left 4 Dead Survival Mode Details Hit