Titus Software was a French Company, hence it developped on Amstrad CPC amongst other machines.
Titus wasn't known for really great game, yet they managed to do quite good graphics, and got their best games at the end of the Amstrad CPC commercial era. The most renowned games were : *Moktar/Titus the fox*Prehistorik ... mostly platformers. Also some good car games : Crazy Car series. They released some games on GX4000... most of them were almost straight "Disk to Cartridge" ports, yet with few improuvement from the disk version, and none were good.
CPC version were often crossdevelopped, alongside Atari ST, Amiga or even PC versions.