[en] Thin films of the heavy-fermion superconductor UPt₃ were deposited on various substrate materials in various orientations by means of a quasi-multilayer sputter process. Strongly (0001)-textured growth of the hexagonal compound was found for a uranium content in the range of 23% to 28% on sapphire (101-bar2), LaAlO₃(111) and SrTiO₃(111) with perfect in-plane order on the latter substrate material. Atomic force microscopy and scanning electron microscopy revealed a Vollmer-Weber-like growth mode resulting in the development of large compressive strain in films on SrTiO₃(111). As a result the electronic transport properties - in particular the temperature dependence of the resistivity - were strongly renormalized. Strong deviations from the typical heavy-fermion characteristics known from UPt₃ bulk samples were found in films on SrTiO₃ with residual resistance ratios ρ(300 K)/ρ₀ up to 930 and a significantly reduced superconducting transition temperature of 130 mK. (author)