Yeah I only had L4D2, so Siren decided to be kind enough to gift this to me after him and Rose were playing it.
Tbf there's like no reason to play the first one if you have the 2nd lmao
I disagree L4D1 was awesome and still holds up for me personally, I did a full playthrough of 1 and 2 with my brother last month was super fun!
Is a brilliant game and i still have fond memories of playing it on the xbox 360 after seeing it on youtube and being terrified of everything because i hated horror. Fell in love and beat it in like 2 days and moved onto the 2nd one which was even better! But the 2nd one has all the campaigns from the first with all the new infected and stuff so i only play the first for pure nostalgia