By Lars Mucklejohn Cambridge-based video game publisher Frontier Developments has raised its full-year earnings guidance after reporting a strong sales across its portfolio and lower operating costs as it looks to bounce back from a rough 2023. The AIM-listed firm said in a trading update on Tuesday that its portfolio had “performed well” over the last month “with pleasing contributions from all games”. It highlighted strong performance from its creative management simulation titles, boosted by a Frontier publisher sale on PC storefront Steam between 1 and 15 April. The firm added that its con…