Basically all the Lego games (although 13y olds might already find them too child-like, depends...).
They all have split screen, so are suitable for couch (or desk) coop.
Also the slightly older ones are quite inexpensive when buying them during sales (a few €).

Special recommendation: Lego City Undercover.

Another fun couch-coop-capable game would be SuperTux, a Super-Mario-Cart like game.
This one is OSS and therefore completely free!