Best mods for co-op gaming
Single-player is old and busted, check out the new hotness
Garry's mod
Game: Half-Life 2
Link: www.garrysmod.com
Both the paid-for Garry's Mod and the free 9.0.4 version enable you to play the original Half-Life 2 maps on servers - which is possibly a revelation to some people as it's not widely advertised. All you need to do is start a LAN server and select one of the HL2 maps from the map list and you're set. And because you're playing via GMOD, that means instant, boil-in-the-bag co-op, communally battling all of Valve's carefully placed beasties, and with the bonus that you're able to use all of GMOD's resources to set devious traps. The only problem is that the levels don't string together as they do in the full game, but all you have to do is load the next level manually. If you fancy a more tuned experience, there are other, more specialised, mods (Follow Freeman and Synergy), but GMOD is all you really need.
Sign up to the GamesRadar+ Newsletter
Weekly digests, tales from the communities you love, and more

Punch-Out speedrunner "took 75,000 attempts over nearly 5 years" landing 1-in-10,000 luck and 21 frame-perfect punches to finally beat Mike Tyson in under 2 minutes

Split Fiction's Josef Fares thinks game devs should embrace AI: "I can understand the fact that some people could lose their jobs, but that goes for every new technology"