Nothing to download, nothing to sign into, nothing on the disk — open the link and play. 
| genre | what is in it |
|---|---|
 zombies |
BO1 Zombies · Kino der Toten · Moon · BO3 Cheese Cube |
 shooters |
Black Ops 2 · Modern Warfare 2 · Halo CE (desktop and mobile) · Quake 1 and 2 |
 arcade |
the classics that used to need an emulator |
 quick rounds |
five-minute games for a coffee break |
Why browser versions are the useful ones — they run on a school laptop, an office PC or a phone, they leave no files behind, and a shared link works for the whole group chat. 
The picks in the original list — BO1 Zombies · Kino der Toten · Moon · BO3 Cheese Cube · Black Ops 2 · Modern Warfare 2 · Halo CE · Quake 1 and 2 — all through vel.gg.
Bookmark the hub once and you never search for “play X online” again.
!